Experienced weightlifters retain less protein in their bodies after workouts compared to beginners, regardless of when they eat protein and carbs.

Scientific Claim

Trained young men had significantly lower nitrogen balance than untrained men at both immediate (1.1 vs 1.3 g/24h; P <0.05) and 6-hour delayed (0.5 vs 1.2 g/24h; P <0.01) protein and carbohydrate intake after resistance exercise.

Original Statement

“The nitrogen balance was significantly lower in the trained men than in the untrained men at both P0 (P <0.05) and P6 (P <0.01).”

From study:Effect of timing of protein and carbohydrate intake after resistance exercise on nitrogen balance in trained and untrained young men

Evidence Quality Assessment

Claim Status

appropriately stated

Study Design Support

Design supports claim

Appropriate Language Strength

definitive

Can make definitive causal claims

Assessment Explanation

RCT design with direct comparison between groups allows definitive statements about nitrogen balance differences in this population. The claim accurately reflects the measured outcomes without overgeneralizing.

Evidence from Studies

Supporting (1)

Effect of timing of protein and carbohydrate intake after resistance exercise on nitrogen balance in trained and untrained young men

Randomized Controlled Trial

Human

2014 Aug 6

Contradicting (0)

No contradicting evidence found

Source Study

Effect of timing of protein and carbohydrate intake after resistance exercise on nitrogen balance in trained and untrained young men

Score: 46

DOI: 10.1186/1880-6805-33-24

Similar Assertions

For men new to weightlifting, eating protein and carbs right after a workout or waiting six hours doesn't change protein retention in the body.

96%

For men who regularly lift weights, eating protein and carbs right after working out leads to better protein retention in the body compared to waiting six hours.

91%

For experienced lifters, eating protein and carbs right after a workout leads to better protein retention per pound of body weight than waiting six hours, but this isn't the case for beginners.

89%

Experienced weightlifters lose over half their protein retention per body weight when delaying protein and carb intake after a workout, but beginners aren't affected much by the timing.

88%