Fitness Tips: What is Flexion and Extension?

When you are getting the grasp of working out, you need to know what is flexion and extension. Flexion is when the angle is decreased, just like in a biceps curl (flexing the biceps), and the extension is when the angle is increased (triceps extension).
We use this terminology all of the time when we want to flex a muscle or extend a certain appendage, so start applying those principles to muscle movements and you will be able to know which muscle is involved.

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