SETUP: Set a cable pulley as high as it can go. Stand about two feet from the cable station then kneel on a mat. You can use a W-handle, a rope, or a straight bar for this exercise.
LIFT: Pull the weight down into a crunch by squeezing your abs hard and breathing out. Resist the urge to pull via your arms. I like to focus on pulling my elbows down and into my abs to achieve this contraction.
TIP: You should have a 90* angle at your hips (see video). Your knees will be directly underneath your hips. This is the optimal position to engage your abs. You’ll see other people sit back onto their legs while they do this exercise; don’t copy that bulls**t.