Strength Training vs Cardio for Fat Loss and Healthy Ageing: What the Latest Research Says
Is strength training or cardio better for fat loss, muscle preservation, and healthy ageing? Explore the latest research and a practical exercise plan.
EXERCISEAGING
Dr. T.S. Didwal, M.D.(Internal Medicine)
10/17/202619 min read
When patients embark on a journey to lose weight or regain their health, the focus almost always lands on the bathroom scale. However, the scale tells only part of the story. For adults in midlife and beyond, losing weight without protecting lean muscle mass can unintentionally reduce metabolic rate, strength, and long-term functional independence.
This is why the latest clinical research on strength training versus cardiovascular exercise marks a vital shift in patient care. Modern studies—examining middle-aged adults, healthy seniors, and individuals with sarcopenia—reveal that exercise modalities should not be treated as a zero-sum choice. While aerobic exercise boosts cardiorespiratory fitness and energy expenditure, progressive resistance training provides the essential physical stimulus required to safeguard muscle, optimize glucose regulation, and reduce fall risk.
Understanding this distinction matters because it changes how patients approach healthy ageing. Rather than chasing rapid weight loss that sacrifices physical resilience, evaluating the evidence allows individuals to build an integrated, sustainable routine. Combining cardio and strength work ensures that as patients lose fat, they remain strong, active, and capable of living independently for decades to come.Introduction: Should You Lift Weights, Do Cardio, or Combine Both?
If your goal is to lose body fat, improve metabolic health and maintain a strong, functional body as you age, should you prioritize strength training or cardiovascular exercise?
The answer is more nuanced than the familiar advice to do cardio for weight loss and lift weights for muscle building.
Body weight alone cannot tell you whether an exercise programme is working. Two people may lose the same amount of weight but experience very different changes in body fat, muscle mass, strength and physical performance. For adults in midlife and beyond, preserving muscle while reducing excess fat is particularly important.
Aerobic exercise improves cardiorespiratory fitness and increases energy expenditure. Resistance training provides a stimulus to maintain or build muscle, preserve strength and support physical function. High-intensity interval training (HIIT) offers another option for improving fitness and body composition, although its suitability depends on an individual's health, conditioning and recovery capacity.
Recent research has examined these approaches in middle-aged adults with obesity, healthy older adults and people living with sarcopenia—a condition characterized by age-related loss of muscle strength and muscle mass.
The emerging message is clear: you do not have to choose between lifting weights and doing cardio. Combining the two is a sensible strategy for improving overall health, although the best programme depends on your goals, starting fitness and ability to recover.
This article examines the latest findings, explains their limitations and translates the evidence into practical recommendations for fat loss, muscle preservation and healthy ageing.
1. Strength Training vs Cardio for Fat Loss: What Did the 2025 Study Find?
A 2025 study published in Scientific Reports investigated how different exercise approaches affected body composition in middle-aged adults with obesity. The researchers followed 71 adults aged 30–60 years for 12 weeks, comparing diet alone with moderate-intensity aerobic exercise, HIIT and resistance training.
Body composition was assessed using dual-energy X-ray absorptiometry (DXA), a widely used method for measuring fat and lean tissue.
The study is useful because it compared several commonly recommended approaches. However, participants were grouped according to their self-reported exercise practices rather than randomly assigned, which limits the strength of causal conclusions.
How were the exercise programmes structured?
Moderate-intensity aerobic training: Participants exercised five days per week, progressing from approximately 40 to 60 minutes per session at an intensity associated with peak fat oxidation.
High-intensity interval training: Participants completed hard intervals lasting approximately four minutes, separated by three-minute recovery periods. The prescribed intensity progressed from around 80% to 90% of VO₂max.
Resistance training: Participants performed predominantly home-based exercises using body weight and elastic bands, including push-ups, squats, band deadlifts and curls.
Diet-only comparison: Participants received dietary guidance without one of the structured exercise programmes.
All exercise groups received personalized dietary guidance.
What happened to body weight and body fat?
Overall Weight Loss Comparison:
Diet alone: −0.9% average body weight changeModerate-intensity aerobic exercise: −3.8% average body weight change
Resistance training: −4.4% average body weight change
High-Intensity Interval Training (HIIT): −5.4% average body weight change (produced the largest average reduction in body weight)
Body Fat Reductions:
All three exercise groups lost significantly more weight than the diet-only group.
Body-fat percentage declined across all exercise groups, measured as relative reductions from baseline:
HIIT: ~10.5% relative reduction
Resistance training: ~7.0% relative reduction
Moderate-intensity aerobic exercise: ~6.4% relative reduction
Important Context & Limitations:
The body-fat percentage figures reflect relative changes from baseline rather than absolute percentage-point drops.
These results should be interpreted cautiously, as they come from a small, nonrandomized study.
What does this mean? Resistance training should not be regarded merely as an optional addition to a weight-loss programme. It can contribute meaningfully to fat loss, especially when combined with dietary changes
Nevertheless, these findings do not establish that HIIT is universally superior to resistance training or moderate-intensity cardio. Different individuals may respond differently, and the best long-term programme must also be sustainable.
Which exercise was most effective for abdominal fat?
One notable finding concerned waist-to-hip ratio, a measure influenced by body-fat distribution and body shape.
Resistance training produced the largest reported reduction in waist-to-hip ratio, approximately 5.9%, and was the only exercise group to show a statistically significant difference from the diet-only group for this outcome. The apparent advantage was most evident among men.
However, waist-to-hip ratio is not a direct measurement of visceral fat. It should not be interpreted as proof that resistance training selectively burns abdominal fat.
The practical message is that resistance exercise may improve important aspects of body composition even when total weight loss is not the largest.
Why did resistance training fail to increase muscle mass?
Surprisingly, the resistance-training group did not show an overall increase in muscle mass during the 12-week intervention.
Several explanations were proposed:
Most participants were new to regular resistance training and may have spent much of the intervention learning the movements.
The home-based programme relied mainly on body weight and elastic bands, which may not have provided sufficient progressive overload for substantial muscle growth.
The dietary intervention emphasized calorie control without specifically increasing protein intake to support muscle development.
The relatively short study duration may have limited the opportunity to detect meaningful changes in muscle mass.
This finding illustrates an important distinction: performing resistance exercise is not automatically equivalent to performing an effective muscle-building programme.
Muscle hypertrophy generally requires sufficiently challenging exercise, progressive overload, adequate recovery and appropriate nutritional support.
For someone whose priority is building muscle while losing fat, the training stimulus and dietary strategy should be designed accordingly.
2. Is Cardio Alone Enough for Weight Loss After 40?
Aerobic exercise is valuable for weight management. Walking briskly, cycling, swimming and running can increase energy expenditure, improve cardiovascular fitness and support metabolic health.
However, weight loss achieved through dietary restriction and aerobic exercise alone may include losses of lean tissue as well as fat. The extent varies with the size of the energy deficit, protein intake, exercise programme, age and initial body composition.
A 2025 narrative review published in the Journal of Education, Health and Sport examined whether aerobic training alone was sufficient for weight loss in middle-aged and older adults. The review concluded that aerobic exercise is beneficial but that combining it with resistance training offers broader advantages for muscle strength, muscle tissue quality and bone mineral density.
This is particularly relevant for people over 40, when maintaining muscle and skeletal health becomes an increasingly important component of long-term physical independence.
Why muscle preservation matters during weight loss
Muscle is not simply tissue that determines how strong you look. It contributes to movement, glucose disposal, physical independence and the ability to perform everyday activities.
Preserving muscle during weight loss may help maintain:
Strength and functional capacity.
The ability to climb stairs, rise from a chair and carry groceries.
Glucose regulation and overall metabolic health.
Physical resilience during illness and periods of reduced activity.
A favourable balance between fat loss and lean-tissue loss.
Resistance training provides a mechanical stimulus that helps the body retain muscle during an energy deficit. Aerobic exercise complements this by improving cardiorespiratory fitness and increasing energy expenditure.
For most adults seeking sustainable fat loss, the better question is therefore not whether cardio works, but whether cardio alone adequately addresses all their health and body-composition goals.
3. Does Combining Cardio and Strength Training Improve Blood Sugar?
Skeletal muscle plays a central role in glucose metabolism. During and after exercise, muscle contractions increase glucose uptake through mechanisms that partly operate independently of insulin. Regular training can also improve insulin sensitivity.
A randomized trial published in BMC Sports Science, Medicine and Rehabilitation in 2024 compared aerobic, resistance and combined exercise in inactive middle-aged men with overweight or obesity.
Body-fat percentage and cholesterol-related measures improved across all three exercise groups. Resistance and combined training also reduced the area under the blood-glucose curve more than aerobic training.
The study included only 20 participants, so its findings should be considered preliminary rather than definitive evidence that one training modality is superior for glucose control.
Nevertheless, the results are consistent with the broader physiological rationale for combining exercise types.
How each form of exercise contributes
1. Aerobic Exercise
Principal Benefits:
Improves cardiorespiratory fitness.
Increases energy expenditure.
Supports insulin sensitivity.
Important Limitations:
Does not provide the same muscle-building stimulus as appropriately prescribed resistance training.
2. Resistance Training
Principal Benefits:
Builds or preserves muscle mass and physical strength.
Supports glucose regulation and bone health.
Important Limitations:
Benefits depend heavily on adequate training intensity, progressive overload, and sufficient recovery.
3. High-Intensity Interval Training (HIIT)
Principal Benefits:
Provides a time-efficient stimulus for improving cardiovascular fitness.
May effectively improve overall body composition.
Important Limitations:
Can be physically demanding.
May not be suitable for beginners or individuals with certain medical conditions.
4. Combined Training (Cardio + Strength)
Principal Benefits:
Simultaneously addresses aerobic fitness, muscle strength, lean tissue preservation, and metabolic health.
Important Limitations:
Requires sensible scheduling to properly balance total workload and recovery.
The most appropriate programme is the one that addresses the individual's needs without creating an unsustainable training burden.
For someone with prediabetes or type 2 diabetes, both aerobic and resistance exercise can be valuable components of an overall management plan. Exercise should complement, rather than replace, prescribed medication, nutrition therapy and clinical follow-up.
4. Does Cardio Interfere With Muscle Growth?
The so-called interference effect refers to the possibility that endurance exercise may reduce some of the adaptations associated with resistance training, particularly muscle hypertrophy and maximal strength.
This concern sometimes leads recreational lifters to avoid cardio altogether.
However, the evidence does not support the idea that all aerobic exercise undermines muscle growth.
Tan and colleagues (2023) studied approximately 22 physically active young men over eight weeks, comparing heavy resistance training alone with resistance training combined with aerobic exercise. The study found no clear superiority of either programme for body composition or muscle hypertrophy and concluded that aerobic exercise could be incorporated without a clear reduction in hypertrophy under the conditions studied.
The trial was small and short, and its participants were young, physically active men. It cannot settle every question about concurrent training, particularly for highly trained athletes undertaking large endurance workloads.
For recreational exercisers, however, moderate amounts of cardio are unlikely to erase the benefits of a well-designed resistance programme.
How to combine cardio and resistance training
A practical approach is to:
Perform resistance training at least twice per week, targeting all major muscle groups.
Include regular aerobic exercise appropriate to your current fitness and medical status.
If muscle growth is the main priority, perform resistance training before cardio when both are done in the same session, or separate them when practical.
Avoid increasing training volume so rapidly that recovery, sleep or exercise quality deteriorates.
Adjust the order and intensity according to your main goal, available time and individual response.
These are general programming principles rather than rigid rules. The ideal arrangement depends on whether the priority is endurance performance, muscle growth, fat loss or overall health.
5. What Is the Best Exercise for Healthy Ageing After 60?
As people enter their 60s and beyond, exercise has an increasingly important role in maintaining physical independence.
The priorities extend beyond weight loss to include muscle strength, walking capacity, balance, cardiorespiratory fitness and the ability to perform daily activities safely.
A 2026 systematic review and meta-analysis by Azimkhani and colleagues examined randomized trials involving healthy adults aged 60 years and older. Across 51 studies and 3,152 participants, aerobic, resistance and combined training all significantly improved peak oxygen uptake and six-minute walk distance.
The analysis did not find statistically significant differences between the three training modalities for these cardiorespiratory outcomes.
This finding suggests that several forms of structured exercise can improve fitness in older adults. It does not mean that the modalities are interchangeable for every outcome: resistance training remains particularly important when the goal is improving or maintaining strength and muscle mass.
Why older adults should not rely on walking alone
Walking is an excellent foundation for an active lifestyle. It is accessible, can be progressed gradually and supports aerobic fitness.
However, walking does not consistently provide enough resistance to preserve or develop muscle strength in every older adult, particularly in the upper body and in people with existing muscle weakness.
A more complete exercise programme includes:
Aerobic exercise: Brisk walking, cycling, swimming or other sustainable activities.
Resistance exercise: Appropriately challenging movements for the legs, hips, back, chest, shoulders and arms.
Balance training: Exercises suited to the individual's balance and fall risk.
Functional movements: Practising chair rises, stair climbing and other activities relevant to everyday independence.
The emphasis should be on maintaining the capacity to live independently, not merely achieving a particular body weight.
6. Sarcopenia: Why Combined Exercise Matters
Sarcopenia is an age-associated muscle disorder involving reduced muscle strength and muscle quantity or quality. It is associated with impaired physical function, falls and loss of independence.
For older adults with sarcopenia, exercise prescription should focus on restoring or maintaining strength and function while accounting for frailty, comorbidities, balance limitations and exercise tolerance.
A 2026 meta-analysis by Hao and colleagues examined combined aerobic and resistance exercise in older adults with sarcopenia. It included 14 randomized trials involving 786 participants.
What improvements did combined training produce?
Specific Performance & Body Composition Outcomes:
Handgrip Strength: Increased by approximately 2.7 kg.
Five-Times Chair Stand Test: Completion time decreased by approximately 0.43 seconds.
Gait Speed: Improved by approximately 0.08 m/s.
Skeletal Muscle Mass & Index: Increased.
Body-Fat Percentage: Decreased by approximately 1.2 percentage points.
Six-Minute Walk Distance: No statistically significant improvement.
Clinical Summary & Takeaways:
Combined exercise (cardio + strength) can effectively improve key measures of strength, physical function, and overall body composition in older adults with sarcopenia.
Benefits are not uniform across every outcome, as evidenced by the lack of significant improvement in the six-minute walk test.
Study Limitations:
The included trials were relatively short in duration.
Current evidence does not establish how long these improvements persist once training stops.
Studies do not yet prove whether these exercise programmes directly reduce long-term outcomes like fractures, hospitalizations, or mortality.
What should patients take away from this research?
For older adults with reduced muscle strength, progressive resistance training should be a central component of the exercise plan, with aerobic exercise added according to functional capacity and medical status.
Training should begin at an appropriate level and progress gradually. People with significant frailty, recurrent falls, severe weakness or complex medical conditions may benefit from supervised exercise and physiotherapy.
The goal is not simply to increase muscle measurements. It is to improve the capacity to walk, stand, climb stairs, recover from illness and remain independent.
7. Can Medication Replace Exercise for Muscle Loss?
Interest in pharmacological treatments for sarcopenia is growing, particularly as weight-loss medications become more widely used.
A 2026 review by Ancel and colleagues in Nature Reviews Drug Discovery examined the biology of muscle wasting during ageing and emerging therapeutic approaches. The review highlighted the continuing need for effective treatments for sarcopenia.
One area of interest is the development of strategies that combine weight-loss-inducing GLP-1 receptor agonist therapies with interventions intended to preserve muscle tissue.
This matters because substantial weight loss can involve reductions in lean mass as well as fat mass. The amount and clinical significance vary between individuals, medications, treatment regimens and measurement methods.
However, several distinctions are essential:
A reduction in lean mass is not necessarily equivalent to an equivalent reduction in skeletal muscle.
A drug that reduces body weight does not automatically preserve muscle strength or physical function.
Emerging treatments should not be considered established therapies until their benefits and risks have been adequately demonstrated.
Exercise and appropriate nutritional support remain important during medically supervised weight loss.
The available review evidence does not establish a pharmacological replacement for progressive resistance exercise. For now, training the muscles remains a foundational strategy for maintaining strength and function.
8. How to Build an Exercise Plan for Fat Loss and Muscle Preservation
The research supports a straightforward principle: combine activities that improve aerobic fitness with training that challenges the major muscle groups.
The exact balance depends on age, current fitness, body composition, injury history, health conditions and personal goals.
A practical weekly framework
Aerobic Activity:
General Target: Build towards 150–300 minutes of moderate-intensity activity per week (or an equivalent amount of vigorous-intensity exercise).
Examples: Brisk walking, cycling, or swimming.
Note: These targets align with general World Health Organization guidelines. Inactive individuals should start below these targets and build up gradually.
Resistance Training:
General Target: Perform at least 2 days per week.
Examples: Exercises targeting major muscle groups, such as squats or chair rises, rows, presses, and hip hinges.
Balance and Functional Training:
General Target: Include regularly, particularly for older adults at risk of falls.
Examples: Supported single-leg balance, controlled chair rises, and step-ups.
Recovery:
General Target: Allow adequate recovery between demanding exercise sessions.
Examples: Prioritizing quality sleep, scheduling easier activity days, and adjusting overall training load.
Nutrition:
General Target: Match energy and protein intake directly to health status and personal goals.
Examples: Eating balanced meals, ensuring adequate protein consumption, and applying appropriate energy restriction when losing weight.Step 1: Establish consistency
A programme that can be sustained for months and years is more valuable than a demanding routine abandoned after a few weeks.
Start with manageable sessions and increase frequency or duration as tolerance improves.
Step 2: Make resistance training progressively challenging
Muscles need a sufficient stimulus to adapt. As exercises become easier, increase resistance, repetitions, range of motion or movement difficulty while maintaining good technique.
Elastic bands and body-weight exercises can be effective, particularly for beginners and people training at home. However, the programme must continue to challenge the muscles as strength improves.
Step 3: Use cardio to complement strength work
Choose aerobic activities that are enjoyable, accessible and appropriate for your health.
Moderate-intensity exercise is a practical starting point for many people. HIIT may be useful for appropriately conditioned individuals, but it is not essential for fat loss or healthy ageing.
People with known cardiovascular disease, significant cardiovascular risk, recent illness or musculoskeletal limitations should seek individualized advice before starting vigorous intervals.
Step 4: Support muscle with appropriate nutrition
During weight loss, avoid unnecessarily aggressive calorie restriction, particularly if muscle preservation is a priority.
Protein requirements vary with age, body size, activity, overall diet and health status. Some older adults may benefit from higher protein intake than the minimum recommended for the general population, but a suitable target should account for kidney function and other clinical considerations.
Resistance training and adequate nutrition work together; neither should be viewed in isolation.
Step 5: Track progress beyond body weight
The bathroom scale is useful, but it is an incomplete measure of success.
Consider tracking:
Waist circumference.
Strength and the loads used in key exercises.
Walking speed or another suitable measure of functional capacity.
Chair-rise performance.
Exercise tolerance and recovery.
Body composition, when a reliable assessment is available and the result would influence management.
A stable body weight can coexist with favourable changes in fat mass and muscle mass. Conversely, rapid weight loss does not guarantee that the desired tissues are being lost.
9. Common Mistakes to Avoid
Mistake 1: Assuming cardio is the only exercise that burns fat.
Resistance training also contributes to energy expenditure and can improve body composition. Its particular value is the stimulus it provides for muscle preservation and strength.
Mistake 2: Believing that any resistance workout will build muscle.
A programme that is too easy, poorly progressed or unsupported by adequate recovery may not provide enough stimulus for substantial hypertrophy.
Mistake 3: Avoiding cardio because it might interfere with muscle growth.
Moderate aerobic exercise can usually be combined with resistance training. The overall workload and scheduling matter more than the mere presence of cardio.
Mistake 4: Chasing rapid weight loss at the expense of muscle.
Large energy deficits can make it harder to maintain lean tissue. A sustainable approach should consider strength, nutrition and physical function alongside the scale.
Mistake 5: Treating HIIT as compulsory.
HIIT is one option, not a requirement. Brisk walking, cycling and other moderate-intensity activities can deliver important health benefits.
Mistake 6: Assuming older adults should train only with light weights.
Older adults can benefit from progressive resistance training. The starting load, exercise selection and progression should be tailored to functional capacity, technique and medical status.
10. What Are the Limitations of the Current Evidence?
Although the overall findings support combined exercise, several limitations deserve attention.
Short intervention periods: Many trials lasted only eight to twelve weeks, providing limited information about long-term maintenance.
Small samples: Some studies included only a few dozen participants, reducing statistical precision.
Nonrandomized comparisons: The 2025 study of middle-aged adults with obesity grouped participants according to existing exercise practices, so differences between groups may not be caused entirely by the exercise programmes.
Differences between participants: Age, sex, training experience, baseline fitness, diet and medical conditions can influence outcomes.
Different measurement methods: Studies do not always measure fat mass, lean mass, muscle strength and physical function in the same way.
Surrogate outcomes: Improvements in body composition or walking tests do not automatically establish reductions in fractures, cardiovascular events or mortality.
Limited generalizability: Findings from young, active men cannot necessarily be applied directly to frail older adults or people with multiple chronic conditions.
These limitations do not undermine the value of exercise. They mean that conclusions should be proportional to the evidence rather than based on a single study or a universal claim that one modality is best.
Clinical Pearls: What the Research Means in Practice
For fat loss: Combine sustainable dietary changes with exercise rather than relying on either alone.
For muscle preservation: Include progressively challenging resistance training, particularly during calorie restriction.
For cardiometabolic health: Both aerobic and resistance exercise can contribute to better glucose regulation and overall fitness.
For healthy ageing: Prioritize strength, walking capacity, balance and everyday function—not just weight or appearance.
For sarcopenia: Combined aerobic and resistance exercise can improve several important measures, but programmes should be individualized.
For HIIT: Use it selectively according to conditioning, medical status, recovery and preference.
For long-term success: Consistency and a sustainable training dose matter more than finding a supposedly perfect exercise modality.
Frequently Asked Questions
1. Is strength training or cardio better for fat loss?
Both can help. In the 2025 study discussed above, all three exercise groups lost more weight than the diet-only group, and HIIT produced the largest average reduction. However, resistance training also improved body composition and offers an important advantage for maintaining muscle and strength. No single modality is best for everyone.
2. Should I do cardio before or after weights?
If muscle strength or hypertrophy is your main priority, performing resistance training first is a reasonable general strategy when both are done in the same session. If endurance performance is your primary goal, the order may differ. Separating demanding sessions can also help manage fatigue.
3. Can I lose belly fat by lifting weights?
Resistance training can contribute to overall fat loss and may improve waist-related measurements. However, it does not selectively remove fat from the abdomen. Abdominal fat reduction depends on overall changes in body fat, influenced by nutrition, activity, genetics and other factors.
4. Is HIIT better than walking for weight loss?
HIIT can be time-efficient and may improve body composition, but it is not essential. Walking is accessible and sustainable for many people. The better option depends on fitness, medical status, preferences and the amount of exercise a person can maintain consistently.
5. How often should adults over 60 lift weights?
General guidelines recommend muscle-strengthening activities involving major muscle groups on at least two days per week. Some individuals may benefit from more frequent training, depending on the programme and recovery. Beginners, frail adults and those with significant health conditions may require supervision and a gradual starting plan.
6. Can older adults build muscle after age 60?
Yes. Older adults can improve strength and, with an adequate training stimulus and nutritional support, can increase muscle mass. The magnitude of improvement varies with baseline muscle status, health, training experience and programme design.
7. Does weight loss always mean losing muscle?
No. Weight loss can include fat mass and lean tissue in varying proportions. Appropriate resistance exercise, adequate nutrition and a sensible rate of weight loss can help support muscle preservation, although they cannot guarantee that all weight lost will be fat.
8. What is the best exercise combination for healthy ageing?
For most adults who can safely participate, a combination of aerobic exercise, progressive resistance training and balance or functional work is a strong general approach. The specific programme should reflect individual goals, mobility, health conditions and fall risk.
Key Takeaways
Strength training vs cardio is a false choice for many people. The two forms of exercise serve complementary purposes.
Structured exercise can improve weight and body composition beyond diet alone, although individual results vary.
Resistance training is valuable for fat loss because it supports muscle preservation and strength, not merely because it burns calories.
HIIT may be effective for selected individuals, but it is neither necessary nor universally appropriate.
In older adults, aerobic, resistance and combined training can all improve cardiorespiratory fitness.
For sarcopenia, combined training improves several measures of strength, physical function and muscle-related outcomes, although long-term evidence remains limited.
Adequate nutrition, progressive overload, recovery and consistency are essential parts of an effective programme.
The most useful measure of success is not simply how much weight you lose, but whether you become healthier, stronger and more physically capable.
The Bottom Line
What the Evidence Tells Us
Strongest practical conclusion:
Resistance and aerobic exercise have complementary benefits; combining them is appropriate for most adults.
Strong evidence:
Resistance training helps maintain/improve muscle strength and function.
Good evidence:
Aerobic exercise improves cardiorespiratory fitness and contributes to energy expenditure and metabolic health.
Emerging evidence:
Combined exercise benefits older adults with sarcopenia.
Less certain:
Whether one modality consistently produces greater long-term fat loss than another.
The evidence does not support a universal contest between lifting weights and doing cardio. Aerobic exercise helps develop cardiorespiratory fitness and supports energy expenditure, while resistance training provides a distinct stimulus for muscle strength and preservation.
For middle-aged adults pursuing fat loss, both can contribute to meaningful improvements in body composition. For older adults, the priorities increasingly include maintaining muscle, physical function, balance and independence. For people with sarcopenia, combined aerobic and resistance training offers measurable benefits, although longer-term outcomes still require further study.
The practical prescription is straightforward: train your cardiovascular system, challenge your muscles, eat to support your goals and progress at a rate you can sustain. This integrated approach is more useful for long-term health than treating cardio and strength training as competing choices.
Author's Note
This article interprets recent exercise research for general health education. Study findings are discussed with attention to their design, population and limitations. Individual exercise and nutrition plans should be adapted to clinical circumstances and personal goals.
About the Author: Dr. T. S. Didwal, M.D. (Internal Medicine), is a physician and medical educator whose health education work focuses on metabolic health, exercise physiology, diabetes and healthy ageing.
Medical Disclaimer: This article is for educational purposes only and is not a substitute for individualized medical advice, diagnosis or treatment. Consult a qualified healthcare professional before starting vigorous exercise if you have cardiovascular disease, significant risk factors, a recent illness or an injury that may affect safe participation.
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References
Hang, S., Xiaoyu, L., Jue, W., et al. (2025). Effects of resistance training and aerobic training on improving the composition of middle-aged adults with obesity in an interventional study. Scientific Reports, 15, 33972. https://doi.org/10.1038/s41598-025-11076-w
Azimkhani, A., Kasraei, R., Sabeti, H., & Almasoodi, A. (2026). The effect of aerobic, resistance, and combined exercise training on cardiorespiratory fitness in healthy people aged 60 years and over: A systematic review and meta-analysis of randomized controlled trials. Biological Research for Nursing, 28(1), 72–90. https://doi.org/10.1177/10998004251348605
Hao, X., Hu, H., Chen, J., Wang, Q., & Xu, G. (2026). The effects of combined aerobic and resistance exercise on older adults with sarcopenia: A meta-analysis. BMC Musculoskeletal Disorders, 27, 274. https://doi.org/10.1186/s12891-026-09647-7
Tan, J., Krasilshchikov, O., Kuan, G., et al. (2023). The effects of combining aerobic and heavy resistance training on body composition, muscle hypertrophy, and exercise satisfaction in physically active adults. Healthcare, 11(17), 2443. https://doi.org/10.3390/healthcare11172443
Ancel, S., Le Moal, E., Wang, Y. X., et al. (2026). Strengthening muscle for healthy ageing: Innovative treatments for sarcopenia. Nature Reviews Drug Discovery. https://doi.org/10.1038/s41573-026-01514-3
Ptak, A. (2025). The effect of aerobic training on weight loss in middle-aged and older adults: Is it a sufficient form of exercise? Journal of Education, Health and Sport, 77, 56778.
Randomized trial comparing aerobic, resistance and combined training in inactive middle-aged adults with overweight or obesity. (2024). BMC Sports Science, Medicine and Rehabilitation. https://doi.org/10.1186/s13102-024-00982-7