The thigh describes the area of the leg above the knee joint and below the hip. Four large muscle groups make up the thigh region:
The Quadriceps - Straighten the knee and bend the hip up
The Hamstrings - Bend the knee and extend the hip backward
The Adductors - Bring the legs together
The Abductors - Move the legs apart
The muscles of the thigh become tight due to the extended amount of time we spend in the seated position during the work day. For this reason it is important to stretch the thigh muscles frequently.