Noted: According to Jill Thein-Nissenbaum, an associate professor in the Doctor of Physical Therapy Program at the University of Wisconsin-Madison and a staff physical therapist for UW Athletics and Badger Sportsmedicine, said that even people who regularly exercise have this problem. She said she knows someone who was in great shape — playing indoor soccer three times a week during the winter — but on his first day back on the golf course, he was left feeling stiff and sore.