Among overweight and obese women aged 60 to 75, a 14-week program of supervised resistance training and a higher protein diet led to greater reductions in body fat and body fat percentage than a higher-carbohydrate diet or exercise alone, without loss of muscle mass or resting energy expenditure.
See the scientific wording
In overweight and obese women aged 60–75, a 14-week supervised resistance training program combined with a higher protein diet (1.28 g/kg/day) resulted in significantly greater reductions in fat mass (−10.2%) and body fat percentage (−6.3%) compared to a higher-carbohydrate diet (−5.9% and −4.3%, respectively) or exercise alone (−2.7% and −2.0%), while preserving fat-free mass and resting energy expenditure.
Very strong evidence
Randomized trialsOne good-quality study supports this claim.
What the research says
1 study reviewedSupporting (1)
Randomized Controlled TrialHuman2018
In older women who are overweight, doing strength training and eating more protein helped them lose more body fat than just exercising or eating more carbs — and they kept their muscle and metabolism the same.
Contradicting (0)
No contradicting studies found yet
That doesn't mean it's settled — it just means no study has tested the opposite.
Quality-weighted scoring: we follow the GRADE framework — each study is rated High, Moderate, Low, or Very Low based on study design, methodology rigor, and risk of bias. A single high-quality RCT can outweigh several weaker observational studies.
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Eating more protein while doing strength training keeps muscle from breaking down during weight loss, which keeps metabolism high. The protein also makes the body feel fuller and signals fat cells to release chemicals that help burn fat instead of storing it. Strength training directly activates muscle-building pathways and improves how nerves control muscles, ensuring the body burns fat instead of losing muscle.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting study
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Among overweight and obese women aged 60 to 75, a 14-week program of supervised resistance training and a higher protein diet led to greater reductions in body fat and body fat percentage than a higher-carbohydrate diet or exercise alone, without loss of muscle mass or resting energy expenditure.
Mechanism
1 studyEating more protein and lifting weights together keeps your muscles from shrinking during weight loss, which keeps your metabolism high. The protein also tells your fat cells to release signals that burn fat and make you feel full longer, so your body keeps using fat for energy instead of breaking down muscle.
Eating more protein while doing strength training keeps muscle from breaking down during weight loss, which keeps metabolism high. The protein also makes the body feel fuller and signals fat cells to release chemicals that help burn fat instead of storing it. Strength training directly activates muscle-building pathways and improves how nerves control muscles, ensuring the body burns fat instead of losing muscle.
Dietary protein intake increases postprandial plasma leucine concentrations, which activates the mTORC1 signaling pathway in skeletal muscle.
mTORC1 activation increases muscle protein synthesis and ribosomal biogenesis, counteracting catabolic signals from energy restriction and preserving fat-free mass.
Resistance training generates mechanical tension in skeletal muscle, activating integrin and focal adhesion kinase signaling that further stimulates mTORC1 and satellite cell activity.
Preserved muscle mass maintains resting energy expenditure by sustaining metabolically active tissue.
Higher protein intake increases adiponectin secretion from adipose tissue and reduces leptin secretion in response to fat mass loss.
Elevated adiponectin enhances fatty acid oxidation in muscle and liver, while reduced leptin signaling promotes sustained satiety and energy deficit.
Neural adaptations from resistance training increase motor unit recruitment and firing frequency, improving force production without altering muscle mass.
Evidence from Studies
Supporting (1)
Community contributions welcome
Effects of Adherence to a Higher Protein Diet on Weight Loss, Markers of Health, and Functional Capacity in Older Women Participating in a Resistance-Based Exercise Program
In older women who are overweight, doing strength training and eating more protein helped them lose more body fat than just exercising or eating more carbs — and they kept their muscle and metabolism the same.
Contradicting (0)
Community contributions welcome
Score Breakdown
No multi-axis breakdown available yet. The overall Pro / Against score above is the best signal.
- No clinical evidence is available; the score reflects mechanistic plausibility only.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Systematic Review of Resistance Training and Protein Intake on Body Composition in Older Overweight Women
Population: Overweight and obese women aged 60–75; Intervention: 14-week supervised resistance training with 1.28 g/kg/day protein; Comparator: Higher-carbohydrate diet or exercise alone; Outcomes: Changes in fat mass, body fat percentage, fat-free mass, resting energy expenditure; Duration: 14 weeks
Randomized Trial of Resistance Training with High Protein vs High Carbohydrate Diet vs Exercise Alone in Older Overweight Women
Population: Overweight and obese women aged 60–75; Intervention: 14-week supervised resistance training with 1.28 g/kg/day protein; Comparator: Higher-carbohydrate diet with same exercise or exercise alone; Outcomes: Fat mass, body fat percentage, fat-free mass, resting energy expenditure; Duration: 14 weeks; Design: Double-blind, randomized, parallel-group
Prospective Cohort Study of Dietary Patterns and Resistance Training on Body Composition in Older Overweight Women
Population: Overweight and obese women aged 60–75; Exposure: Self-reported resistance training and protein intake over 14 weeks; Comparator: Groups with lower protein or no resistance training; Outcomes: Changes in fat mass, body fat percentage, fat-free mass, resting energy expenditure; Duration: 14 weeks
Case-Control Study of Body Composition Changes in Older Women Following High Protein Resistance Training vs Other Interventions
Population: Overweight and obese women aged 60–75; Cases: Those with >8% fat mass reduction after 14 weeks; Controls: Those with <4% reduction; Exposure: Retrospective assessment of diet and exercise type; Outcomes: Exposure to high protein + resistance training vs alternatives; Duration: 14 weeks
Cross-Sectional Analysis of Body Composition and Dietary Patterns in Older Overweight Women
Population: Overweight and obese women aged 60–75; Exposure: Self-reported past 14-week diet and exercise habits; Outcomes: Current fat mass, body fat percentage, fat-free mass, resting energy expenditure; Duration: Single time point