Well that is exactly what happened to me yesterday. I finally was able to go to the gym and I received a gift card for 4 free personal training sessions.
On my second visit, my trainer had me do some leg lungs. First the right leg (15 reps) then the left. Well the right leg went just fine and then the left leg after the third lung I felt a pop in my thigh and the pain began. It was in the front alittle more to the left than the center. My trainer said it was probably a cramp. But I don't think so. I continued to finish the work out.
I did 30 mins. on the treadmill and 10 miles on the cycle. It didn't hurt extremely bad but it was still hurting.
When I got home I took Aleve and put ice on it.
I can't put my leg in the position where my leg is extended back even a little or it hurts, even walking bothers it because of the stide.
Do you have any idea what has happened to my thigh?


It stills hurts. Not extremely bad though. Still can feel a knot in my thigh where it hurts.
April or May before I was able to do my first real lunge. At this time, lunges are hit or miss for me. Some days I can do them, some days I can't. But with all the other methods for targeting your legs I don't really miss them if I can't do them during a particular session.