The Claim
In young adult men performing intense eccentric biceps curls at 110% of concentric one-repetition maximum, T2 relaxation times in the elbow flexor muscles increase immediately post-exercise by approximately 8 ms, peak at 47 ms around 7 days after the first bout, and remain elevated by about 2.5 ms at 8 weeks, indicating a prolonged magnetic resonance signal change following unaccustomed eccentric exercise.
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.
When young guys do super intense bicep curls they're not used to, their muscle scans show changes that start right away, get worse over a week, and can still be seen two months later.
See the scientific wording
In young adult men performing intense eccentric biceps curls at 110% of concentric one-repetition maximum, T2 relaxation times in the elbow flexor muscles increase immediately post-exercise by approximately 8 ms, peak at 47 ms around 7 days after the first bout, and remain elevated by about 2.5 ms at 8 weeks, indicating a prolonged magnetic resonance signal change following unaccustomed eccentric exercise.
What the research says
1 studyStudy: MR measurements of muscle damage and adaptation after eccentric exercise
The study looked at the same type of arm exercise and measured muscle changes using MRI scans, and it found exactly what the claim says: the muscle signal stays changed for weeks after an intense workout.
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.