Quadriceps

Quadruple stands for 4 and quadriceps has 4 different muscle. The quadriceps or "quads" is one of the largest muscles in the body.  Many of the best leg exercises focus on the quads.  The primary function of the quadriceps is leg extension.  Leg extension is the motion of extending your knee like kicking a ball. The quadriceps muscle group is made up of four muscles. The vastus intermedius is found on the front of the thigh, deep to the rectus femoris. The vastus medialis is found toward the inside of the leg, while the vastus lateralis is found toward the outside of the leg. The tendons of these four muscles merge together and attach onto the kneecap and surrounding ligaments.

Vastus intermedius (beneath rectus femoris)
Rectus femoris (peak of quad)
Vastus medialis (teardrop)
Vastus lateralis (sweep)

Recommended Exercise

Squat
Leg Extension
Leg press


Tips

• Keep feet close together during squatting and leg press will help to target more vastus lateralis area.
• Squatting, leg extension and leg press with a wide Stace and toe pointing outwards  will target more vastus medialis. 
• Highper leg extension will target more vastus intermedius & rectus femoris