question: i have bad knees and i tend to over-do the cardio, and have recently pulled a groin muscle, but it was only a minor pull so i only slowed down on the cadio. my leg got worse, so i had to stop. the muscle pull is almost healed, but i feel a lot of pain in my knee and shin. but at night if i twist my foot inward the pain goes away. is this pain from my thigh, knee or shin