Isometric Contraction Lab Report

The difference between isometric and isotonic contractions is how the muscles stretch. In istonic contractions the muscles are able to able to extend and contract. As Marieb (2012) states, "Bending the knee, rotating the arms, and smiling are all examples of isotonic contractions" (p. 195) This means that that the muscles were able to complete the contraction or stretch without being impeded. For isometric contractions the muscles are not able to contract or extend properly. For example, if a person was trying to push up against a wall. The wall would not move and thus the arm would not be able to fully extend. Resulting in the muscles not being able to fully stretch or extend into the position