What 20,000 Muscle Contractions Actually Feels Like (And Why Your Gym Session Can’t Compete)
If you’ve ever finished a set of crunches wondering why your core still doesn’t feel done, there’s a reason for that. Voluntary contractions, the kind you produce by choosing to do a sit-up, can only ever recruit a fraction of your muscle fibres at once. Your body has built-in limits to protect you from exhausting […]