oh, really, Captain Obvious?

i didn't say it will save you from broken bones, but definitely can decrease chance of injuries (including tearing things...)
If you do any sports, you would know that with most of them (chess or poker would be an exception here) people DO dynamic stretching before, to increase range of motions and avoid injuries.
and definitely if you do biking (don't mistake with roadies ), anything more serious than leisure XC, riders DO dynamic stretching, and also they do stretching after a ride, to keep extended range of motions...
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Transition Sentinel | Spesh Tarmac