The Claim
Five days of dry immersion-induced inactivity increases whole-body protein catabolism by 28% in healthy young men, as measured by elevated urinary nitrogen excretion, despite a negative energy balance and no change in fasting or postprandial fat or carbohydrate oxidation.
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.
Five days of complete bed rest in a dry immersion environment causes a 28% increase in protein breakdown in healthy young men, measured by higher nitrogen levels in urine, even when calorie intake is low and fat and carbohydrate metabolism remain unchanged.
See the scientific wording
Five days of dry immersion-induced inactivity increases whole-body protein catabolism by 28% in healthy young men, as evidenced by elevated urinary nitrogen excretion, despite a negative energy balance and no change in fasting or postprandial fat or carbohydrate oxidation.
When muscles are not used, they stop responding properly to insulin, which causes the body to break down muscle protein for energy. This releases amino acids into the blood, and the liver turns the excess nitrogen from these amino acids into urea, which is then removed in urine.
What the research says
1 studyAfter five days of lying still in a special bed, the study found that healthy young men broke down 28% more muscle protein, shown by more nitrogen in their urine — even though their bodies didn’t burn more fat or sugar. This means inactivity alone can cause muscle loss.
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.