Thigh Pain due to Squatting and Crouching

At your thigh muscles, sitting puts your thighs in a bent position, consequently the tensor fascia lata and the rectus femoris whose uses are to broaden the thigh are badly stretched and attenuated while your hamstring muscles with the function to bend your knee become tight and short because of asymmetry of muscle flexibility as found in the tilting board principle.

Upon squatting or crouching, your sitting position is inflated with immoderate hip and thigh bending. For this reason, the tensor fascia lata and rectus femoris muscles become tighter and shorter at your hip and longer and extended at the thigh. Unrestrained shortening compression in bending (inflection) at your hip and unrestrained protraction compression in straightening (elongation) at your knee hurt both tensor fascia lata and rectus femoris muscles.

To sustain a person in a crouched posture or squatting posture, muscles in the back of you hip must go through an excessive lengthening compression as well an undue shortening contraction at your thigh. Because muscles under the hip that must go through a lengthening compression like the adductor magnus and gluteus maximus are big and powerful, the hamstring muscles that also performs a similar maneuver at your hip may now have denser power for flexing the thigh. The more powerful the twist of your hamstring muscles to aggressively bend your knee, the more flexibility the tensor fascia lata and rectus femoris muscles must wield to counterbalance this pressure.

For that reason, if you want to stand upright after squatting or crouching, the earliest weakness, pain or hurt will be experienced in the front part of your thigh and front part of your thigh giving rise to excessive thigh discomfort.

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.