Story
antagonism · 1
↮Does stretching prevent injury
Holding a stretch for more than 60 seconds before exercise briefly lowers your strength and power afterward (strength by about 5% on average). For explosive sports, long static stretching before competing does little to prevent injury and costs some performance up front; dynamic movements make a better warm-up.
regulates · 2
A cool-down cannot clear delayed-onset muscle soreness, because the soreness was never caused by lactate: lactate is cleared within an hour after you stop, while soreness peaks a day or two later. It comes from small injuries left by muscles working while they lengthen (eccentric contractions), and the repair that follows.
The part of a warm-up worth doing is raising body temperature and rehearsing the movements, which makes the session better. What actually prevents injury is something else: in a meta-analysis of randomized trials, strength training cut sports injuries by about two thirds, while stretching showed no effect. You also have to keep the pace of increasing your training in check.