July 15, 2026 · 7 MIN
Ultramarathon Recovery: What Happens to Your Body and a Week-by-Week Return Timeline
A 100km ultramarathon causes muscle damage equivalent to 300+ eccentric contractions per leg, elevates CK levels 50-fold, and impairs immune function for up to 72 hours. Here's the science of ultra recovery and a structured return-to-training protocol.
