Glossary · Fitness
Muscle Protein Synthesis
Muscle protein synthesis (MPS) is the process by which the body builds new muscle proteins, the biological basis of muscle growth.
Why it matters
Muscle protein synthesis is part of ongoing muscle-protein turnover. Resistance training and protein intake can influence it, while long-term muscle gain cannot be predicted from one short-term MPS response.
For resistance-trained adults, adequate daily protein and an effective training stimulus are central planning factors. An exact meal count is not a requirement for muscle growth.
Protein intake without training can affect muscle protein synthesis but does not replace a long-term progressive training stimulus for strength and muscle adaptations.
Common misconception: more protein produces proportionally more muscle. Average additional benefit diminishes as intake rises in research, while individual contexts vary.
Related terms
Related guides