End extension

End extension is when you straighten your arm or leg all the way out until it is completely straight. Imagine if you had a toy action figure with a bent arm or leg, and you wanted to straighten it out so it looked completely straight. That’s what end extension is! It’s like your arm or leg is a superhero action figure that you’re posing to fight off villains. But instead of fighting bad guys, you’re just stretching and making your muscles stronger.