Overview. The two major muscle groups of the upper leg are the hamstrings and the quadriceps. ... Biceps Femoris. The biceps femoris is a member of the hamstring muscle group. ... Semitendinosus. ... Semimembranosus. ... Rectus Femoris. ... Vastus Lateralis. ... Vastus Medialis. ... Vastus Intermedius. read more
The hamstring muscle group is in the back of the thigh. The quadriceps muscle group is the large bulk of muscle at the front of the thigh. The hamstrings are made up of three individual muscles, while the quadriceps is made up of four different muscles. read more