The Claim
In young men undergoing short-term energy restriction, a protein intake of 1.2 g/kg/day results in a 27% reduction in fasted muscle protein synthesis, while a protein intake of 2.4 g/kg/day combined with resistance exercise reduces this decline to 14%.
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.
When young men reduce their calorie intake for a short time, eating 1.2 grams of protein per kilogram of body weight causes a 27% drop in muscle protein synthesis, but eating 2.4 grams per kilogram along with resistance exercise limits the drop to 14%.
See the scientific wording
In young men during short-term energy restriction, consuming 1.2 g/kg/day of protein is insufficient to prevent a 27% reduction in fasted muscle protein synthesis, whereas 2.4 g/kg/day attenuates this decline to 14% when combined with resistance exercise.
When calories are reduced, the body slows down muscle building because energy levels drop and the system that tells muscles to make protein gets suppressed. Eating more protein provides more leucine, which directly turns on the muscle-building switch. Doing resistance exercise also turns on that same switch by sensing tension in the muscle. Together, they keep the muscle-building process running at a higher rate, preventing most of the loss that happens with low protein intake.
What the research says
1 studyWhen young men eat fewer calories, their muscles make less protein — but eating more protein (2.4g per kg of body weight) and lifting weights cuts that drop in half compared to eating less protein (1.2g per kg).
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.