question: Hello doctor, Just to give you a bit of a background, I am a young male who is heavily involved in sports. Several months ago, I noticed my left (non-dominant side) hip internal rotation is very low or practically non-existent. I also noticed pinching at the front of my hip when getting into a deep squat position. In the last few weeks, I have experienced a dull ache in the deep groin or hip region on that side. This usually went away a day or two after training, but since last Friday it has not gone away. It is not a debilitating pain, but it is noticeable when twisting, turning or kicking. Generally, it seems to go away after 20 to 30 minutes of warming up but will come back again post-training. Hamstring flexibility is also low on that side. Could this be a hip impingement? If not, what else could it be? Would it be alright to train in the meantime?