i just pulled my hamstring this weekend, 50 meters into the 4×100. rain+wind+cold. i tore my quad frosh year in hs (3 yrs ago) and the physical therapist told me that ill have scar tissue. ever since, my hamstrings, especially the side of the quad injury, seem to get hurt at least once a year. usually ill pull it when i accidently lean back when im tired in a sprint or if the temperatures are cold out.