Chin-Up

The chin-up uses a supinated (underhand) grip on a pull-up bar, with the palms facing the lifter. The supinated grip externally rotates the humerus, which changes the pulling mechanics: the elbows tuck closer to the ribcage through the pull, and the biceps are more mechanically advantaged than in a pull-up (pronated grip).

For most lifters, chin-ups are easier than pull-ups at the same bodyweight — often by two or three reps. This is not a flaw in the exercise; it is a byproduct of the biceps contributing more. That makes chin-ups a better volume-accumulation exercise for people still building their first bodyweight pulls. Pull-ups are a better mid-trap and lower-trap builder; chin-ups are a better lat and bicep builder.

Programming chin-ups is straightforward: accumulate reps across multiple sets (5 sets of 5, or 3 sets to near failure), or weight them with a dip belt once a bodyweight set of 10 is routine. Chin-ups respond well to frequency — multiple exposures per week at moderate volume beat one exhausted session per week.

In LiftProof, chin-ups are tracked either as bodyweight reps (total reps per session) or as weighted chin-ups once a dip belt is in use. The pull pattern is different enough from the pull-up that most programs prescribe one or the other by name, not as interchangeable.

• Full hang at the bottom — arms straight, shoulders packed down
• Pull the elbows down and back, not up
• Chin clearly over the bar at the top — no neck craning
• Control the eccentric — a 2-second lower builds more strength than dropping off the bar
• Squeeze the lats at the top — hold for a beat before the descent

• Kipping when the set gets hard — kipping turns a strength rep into a CrossFit rep
• Partial reps at the top — chin needs to clear the bar for the rep to count
• Dropping out of the descent — the eccentric is half the exercise
• Only ever training chin-ups and never pull-ups — the two exercises build different parts of the upper back

• pull up→
• lat pulldown→
• barbell row→