The Claim
Resistance exercise performed twice weekly for 12 weeks increases fat-free mass by approximately 0.9 kg and reduces fat mass by 0.4 kg in healthy active older men aged 67 years.
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 healthy active men aged 67, performing resistance exercise twice a week for 12 weeks results in a 0.9 kg increase in fat-free mass and a 0.4 kg decrease in fat mass.
See the scientific wording
Resistance exercise performed twice weekly for 12 weeks increases fat-free mass by approximately 0.9 kg and reduces fat mass by 0.4 kg in healthy active older men aged 67 years, indicating a favorable shift in body composition.
Lifting weights stretches and stresses muscle fibers, which triggers muscle cells to build more contractile proteins and grow larger. This increases lean body mass. At the same time, the muscle releases signaling molecules that calm down chronic inflammation in fat tissue and immune cells, causing fat stores to shrink. Together, these changes result in more muscle and less fat.
What the research says
1 studyThis study found that older men who lifted weights twice a week for three months gained about 0.9 kg of muscle and lost 0.4 kg of fat — just like the claim says. No extra benefit from protein shakes, so the weights did the job.
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.