Muscles that Cause Thigh Pain

Thigh pain after squatting or crouching is ordinary in people with tight thigh muscles. Many of us who are in sitting posture everyday have tight muscles in the both thighs. So if we do squatting or crouching movements whether performed in a prolonged way or continuously, you can feel impuissance, pain or discomfort in front of your thighs and also along the inner part of your thighs. It would tell you that your muscles in those areas were ill-treated by the scrunching up or squatting postures.
The muscle responsible for pain or discomfort at the forepart of your thighs is called the rectus femoris muscle.

If thigh pain is in your outer part of your thighs, the discomfort tend to be caused from stress of your tensor fascia and if discomfort is in the back of the thighs, the discomfort is located on the hamstrings muscles.
Even so those quadriceps muscles are critical for causing prefrontal thigh discomfort, they're not the main thigh muscles to be impaired because those quadriceps cut through only a joint i.e. the knee joint while rectus femoris (that is also the quadriceps muscle), hamstrings and tensor fascia lata cross both your thigh joints and are therefore more probable to be ill-treated with squatting or crouching.

Previously, anterior thigh pain is more commonly found instead of posterior thigh pain. As our sedentary positions always involve sitting for sustained periods of time, the muscles at the front of your thigh such as tensor fascia lata, rectus femoris and psoas major can be inveterately contracted whereas the tissues in the rearwards of your thigh are badly overstretched and attenuated.