I sprained my right knee back in January and it just started feeling 100% pain free the in the last month and a half, so I started exercising with free weights and taking it very easy on my lower body. I did some light squats with a 15LB barbell and felt the normal muscle pain in both legs the next day. However, it has now been 4 days since I exercised and I have had a cramp going from mid-calf to my glute (only on the right side...the left feels just fine). I am having a really hard time walking and straightening my leg, it feels better bent and I have to walk on my tip-toes on this leg. It feels like a really bad charley horse...I tried stretching it, icing it, and I have been taking my potassium and magnesium...anyone have some words of wisdom for me? I really hope it doesn't last much longer!