Research

Hormonal

Resistance training elevates resting mixed muscle protein synthesis rates by approximately 48% without changing resting myofibrillar protein synthesis rates.

After 8 weeks of training, your body's baseline protein turnover increases, specifically for non-muscle proteins like collagen and enzymes. This doesn't mean you are building more muscle at rest, but rather that your cellular maintenance is more active. This is a sign of adaptation, not necessarily hypertrophy.

GoodSupportsHIGH confidence
After training, resting mixed MPS rate was elevated (+48%; P < 0.05). Myofibrillar MPS was unchanged at rest following training (P = 0.61).
Paul L. Kim et al. · The Journal of Physiology · 2005

Why this rating

Robust study design with unilateral comparison and isotopic tracing.

Source

Fasted‐state skeletal muscle protein synthesis after resistance exercise is altered with training

Paul L. Kim et al. · The Journal of Physiology · 2005

DOI 10.1113/jphysiol.2005.093708

rct · n=8Cited 170×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →