Dana Linn Bailey Describes Her Five-Five-Five Leg Extensions, AKA 5-5-5 Leg Extensions
Five-Five-Five Leg Extensions by Dana Linn Bailey offering a method that focuses on variety at different range of motion positions for the four muscles of the Quadriceps group (@DanaLinnBailey/YouTube). Arlington Athletics is definitely a fan of this type of exercise for a different kind of workout for the quadriceps, which in this case serves as the four muscles that extend (straighten) the knee (Vastus Medialis Oblique, Vastus Lateralis, Vastus Intermedius, and Rectus Femoris. These four muscles combined are known as the quadriceps. By the way, the Rectus Femoris is the only quadriceps group muscle that is also a hip flexor. Since leg extensions are done in a seated (hip flexed) position, the Rectus Femoris might not get full tension with contraction due to a shortened position that causes slack along the length of the muscle. The forward tilt of the pelvis in the seated position puts the Rectus Femoris attachment on the pelvis (the origin) closer to the knee attachment (the i...