N3 Anatomy and Physiology (1st Sem AY 2022-2023)

In Isotonic Contractions, the muscles are contracting while changing their length. Here are some of the thigh and leg muscles that undergo this contraction as exhibited by Hidilyn Diaz:

1. Rectus Femoris muscle

2. Vastus lateralis muscle

3. Vastus medialis muscle

4. Biceps femoris muscle

5. Semimembranosus muscle

While in Isometric Contractions, the muscle does not move and does not change its length, yet it simultaneously contracts, namely:

1. Brachialis muscle

2. Biceps brachii muscle

3. Brachioradialis muscle

4. Pronator teres muscle

5. Pronator quadratus muscle