I started Taekwondo at 44 years old and have been going to class 2 times a week for the last 2.5 years. I stretch before and after, hydrate, and ice a couple times after each workout. I do push myself like I'm 25 still which may be the problem but even after all this time I still have sore hamstrings after almost every class. Was planning on reaching out to Doctor/PT next. Anyone experienced this?