引体上升（英语：Pull-up）是锻炼上身肌肉的运动，主要训练背阔肌，拉起的可以是锻炼者自身的体重，亦可以额外以铁饼增加重量，或者以机械辅助减少重量。

引体向上是一种体能测试的手段，尤其是男性的体能测试手段。一个标准的引体向上动作，双手正手握在上方的横杠上，双臂完全打开，双脚离地。用手臂和背部的肌肉，把自己的身体拉起来，直到下巴越过横杠。然后把身体放下，直到双臂伸直。如此重复。同样的动作，但双手反握，则称为反手引体向上。用你手臂和背部的肌肉，把自己的身体拉起来，直到下巴越过横杠。然后把身体放下，直到双臂伸直，再重复动作。一般来说，男性要比女性更容易完成这个动作。

A pull-up is an upper-body compound pulling exercise. Although it can be performed with any grip, in recent years some have used the term to refer more specifically to a pull-up performed with a palms-forward position.

The term chin-up, traditionally referring to a pull-up with the chin brought over top of a bar, was used in the 1980s to refer to a palms-away (overhand/pronated) grip, with a palms-toward (underhand/supinated) grip being called a "reverse-grip" chin-up.