Component One - The Human Body and Movement in Physical Activity and Sport
Component Two - Socio-Cultural Influences and Well Being

Muscles & Joint Actions

A voluntary muscle is a muscle that you can control. These are also known as skeletal muscles and always work in pairs. There are 13 muscles of the body that you need to know and these can be found below. Listen to the voice recording to find out about the muscles of the body.

Joint Actions
Your voluntary muscles move in different ways and this is especially important in sport. We call these movements joint actions. Below you can find the different joint actions that your muscles can create.

The table below outlines all of the muscle actions that you need to know, along with the agonist (contracting) muscle and antagonist (relaxing) muscle.

Quick-Fire Questions

1. Which muscle works as an antagonistic pair with the biceps?

Question 1 of 5


Ben Stokes is shown here taking a wicket for England. What muscle action is used at the shoulder joint as he bowls the ball?

Question 2 of 5

3. Which muscle is the antagonist when the quadriceps contract?

Question 3 of 5


Which muscle is contracting to cause flexion at the hip joint in this picture?

Question 4 of 5

5. What type of joint action is possible at a hinge joint?

Question 5 of 5