Key fact One way to remember which muscle is the agonist – it's the one that's in 'agony' when you are doing the movement as it is the one that is doing all the work. For example, when you ...

Key fact One way to remember which muscle is the agonist – it's the one that's in 'agony' when you are doing the movement as it is the one that is doing all the work. For example, when you ...