The Claim
In old male mice, a 4-week anti-myostatin antibody treatment resulted in increased muscle mass without a corresponding increase in whole-body energy expenditure, differing from the metabolic effects observed in myostatin-knockout mice and indicating that modest muscle hypertrophy alone may not alter metabolic rate.
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 male mice, a treatment that increases muscle size did not raise total energy use, even though similar genetic changes in other mice did raise energy use, showing that muscle growth alone does not always change how much energy the body burns.
See the scientific wording
In old male mice, a 4-week anti-myostatin antibody treatment did not increase whole-body energy expenditure despite increasing muscle mass, contrasting with findings in myostatin-knockout mice and suggesting that modest hypertrophy may be insufficient to alter metabolic rate.
Blocking myostatin makes muscles bigger, but the extra muscle doesn't burn more energy at rest because each gram of muscle uses the same amount of energy as before. The body doesn't increase its overall calorie burning just because there's more muscle, even though the muscles get stronger and handle sugar better.
What the research says
1 studyIn older male mice, giving a drug to make muscles bigger didn’t make them burn more calories, even though bigger muscles usually do. This suggests that just a little bit of extra muscle doesn’t change how much energy the whole body uses.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
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