The Claim
In young men, fat-free mass measured by air displacement plethysmography decreases by approximately 600 grams 24 hours after exhaustive cycling when glycogen is not replenished, primarily due to the loss of muscle and liver glycogen and associated bound water, rather than changes in structural tissue.
What the research says
Challenges is higher
Challenge is ahead, but a single strong supporting 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.
After a really tough bike ride, young guys can lose about half a kilo of 'lean mass' the next day if they don’t eat enough carbs to refuel — but it’s not muscle loss, it’s mostly water stuck to stored fuel in the body.
See the scientific wording
Fat-free mass measured by air displacement plethysmography decreases by approximately 600 grams in young men 24 hours after exhaustive cycling when glycogen is not replenished, primarily due to loss of muscle and liver glycogen and associated bound water, rather than changes in structural tissue.
What the research says
1 studyThe study found that fat-free mass went down after hard exercise without carb recovery, but the water in muscles didn’t change like we’d expect if glycogen and its water were the main reason.
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.