Muscle Protein Synthesis (MPS)
The biochemical process of incorporating dietary amino acids into bound skeletal muscle contractile tissue.
Clinical & Bioenergetic Overview
Muscle Protein Synthesis (MPS) is the molecular mechanism by which muscle tissue repairs and grows. Net muscle protein balance = MPS minus Muscle Protein Breakdown (MPB). To retain or build muscle tissue during a caloric deficit, MPS must equal or exceed MPB, which requires sufficient essential amino acids (specifically leucine) and resistance training stimulus.
Mathematical Formula & Calculation
Real-World Worked Example
Consuming 30g to 40g of high-quality protein containing at least 2.5g of leucine stimulates maximal MPS for approximately 3 to 4 hours.
Why It Matters for Dieting
Distributing daily protein across 3 to 5 meals containing 0.3 to 0.4 g/kg per meal maximizes cumulative 24-hour MPS stimulation.
Frequent Mistakes
Consuming 80% of daily protein in a single evening meal, which limits total daily stimulation of the MPS pathway compared to distributed feeding.
Set Daily Protein Target
Calculate your optimal daily protein grams based on ISSN guidelines.
Related Bioenergetic Terms
The metabolic energy cost required to chew, digest, absorb, transport, and metabolize ingested nutrients.
The relative caloric distribution of protein, carbohydrate, and fat consumed within a daily diet.