The Claim
In older obese adults with heart failure with preserved ejection fraction, caloric restriction combined with aerobic exercise results in a loss of approximately 2.1 kg of skeletal muscle mass over 20 weeks, and the addition of resistance training does not prevent this loss.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In older adults who are obese and have heart failure with preserved ejection fraction, losing weight through reduced calorie intake and aerobic exercise causes a loss of about 2.1 kilograms of skeletal muscle over 20 weeks, and adding strength training does not stop this muscle loss.
See the scientific wording
In older obese adults with heart failure with preserved ejection fraction, caloric restriction combined with aerobic exercise leads to a loss of approximately 2.1 kg of skeletal muscle mass over 20 weeks, and adding resistance training does not prevent this loss.
When the body burns more energy than it takes in, it breaks down muscle tissue for fuel, even if the person lifts weights. The body prioritizes saving energy over building muscle, so strength gains from lifting weights happen without adding muscle mass because the muscle is still being broken down.
What the research says
1 studyWhen older, obese adults with heart failure lose weight by eating less and doing cardio, they lose about 2 kg of muscle — and adding weight training doesn't stop that muscle loss, even though it makes their muscles stronger.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.