I’m thinking that cold weather can contribute to tightness. It probably constricts blood vessels, reducing blood supply to muscles. Also, in order to keep the body warmer, the muscle tone would be raised is my guess(shivering and involuntary contractions of the muscles in order to keep the body temperature up)
My guess is if you warm up adequately, and stay warm between sprints, you’ll be fine. Anybody else have any insight?