Pull-Up Form: Strict vs. Kipping, and What Chin Over the Bar Really Means
Ask five people at a gym how many pull-ups they can do and you can get five numbers that do not mean the same thing. One person means dead hang to chin over the bar. Another means chin to the bar with a bit of swing. A third is counting the ones where the eyes got there. The number is only useful if everyone agrees on what a rep is.
This post is about that agreement. What a strict pull-up is, how to set up and pull, where kipping fits and where it does not, and why the chin clearing the bar is the line that decides whether a rep happened.
What a strict pull-up is
A strict pull-up starts from a dead hang: arms straight, feet off the floor, body still. You pull until your chin is above the bar, then lower under control until your arms are straight again. That is one rep. No swing, no kick, no bounce out of the bottom.
Grip changes the name, not the standard. Palms facing away is a pull-up. Palms facing you is a chin-up. A neutral grip on parallel handles sits between the two. All three are strict if the hang is dead and the chin clears the bar. The US Marine Corps fitness test, for one, accepts either an overhand or an underhand grip and holds both to the same dead hang and the same chin over the bar.
The reason to care about the strict version, even if you never plan to compete in anything, is that its number means the same thing every time. Every shortcut changes what is being counted. Starting with bent arms or stopping short of the bar moves your body a shorter distance, and a swing lends momentum, so either one takes some of the work off the arms and back while the count stays the same.
Setting up: grip, hands, and the hang
Part of good form is set before the pull starts. Take a few seconds at the bottom to get these right.
| Element | Do this | Not this |
|---|---|---|
| Grip width (overhand pull-up) | A little wider than shoulders | Very wide (a shorter range of motion) or hands touching |
| Thumb | Wrapped around or resting on top, whichever you keep every rep | Switching between sets |
| Wrist | Straight, knuckles pointing up | Bent back so you hang from the fingers |
| Shoulders at the bottom | Let the arms straighten, then pull the shoulder blades down slightly | Shrugged up into the ears |
| Legs | Together, straight or crossed at the ankles, slightly in front | Swinging or cycling |
| Eyes | Straight ahead or slightly up | Craning the head back to look at the bar |
A swing that starts in the hang does not stop by itself during the pull. If your legs are moving at the bottom, they will still be moving at the top. Squeeze your glutes, tuck your ribs a touch, and let the swing die before you pull.
The pull and the lowering
Start the rep with the shoulder blades, not the elbows. Pull them down and slightly together before your arms bend. It is a small movement: the shoulders travel down, away from the ears, before the arms do anything. That is the opposite of the shrug you are trying to avoid at the top.
Then drive the elbows down toward your ribs. Think of pulling the bar to your upper chest rather than pulling your chin up to it. Let the chin rise with the body instead of reaching the head forward for the bar.
Lower with control. One to two seconds, all the way to straight arms. Dropping through the bottom skips the lowering half of the rep. The bottom of the rep is the beginning of the next one, so arrive there still and ready.
Strict vs. kipping: an honest comparison
Kipping is the swinging pull-up you see in CrossFit. You drive with the hips and use the momentum of the swing to help carry you up to the bar. It is a real skill, and in a CrossFit-style timed workout, using it is not cheating.
It is also a different test. In a kip, part of the lift comes from the hip drive and the swing instead of the arms and back, so a kipping number and a strict number do not measure the same thing. If the number you want to grow is your strict one, get the strict rep first. A kip that reaches the bar does not tell you whether you could have pulled there without the swing.
| Strict | Kipping | |
|---|---|---|
| Momentum | None | Hip drive and swing |
| What lifts you | Arms and back | Arms and back, helped by the swing |
| Where you see it | Military fitness tests such as the USMC PFT | CrossFit-style timed workouts |
| What the number tells you | How many times you pulled yourself up from a dead hang | How many times you got up with help from the swing |
| PULL UP KING counts it | When the chin crosses the judging line | Same rule; the app does not check for swing |
The problem is not kipping. It is kipping by accident. A beginner who swings to get the last rep is not doing a CrossFit skill. They are letting the swing do part of the last rep and counting it as strict.
Chin over the bar: why the line is where it is
Military fitness tests such as the US Marine Corps PFT count a pull-up from a dead hang to the chin over the bar. Not the eyes, not the nose, not "close enough." The point of a fixed finish line is that every rep is measured against the same thing. If the finish line drifts down as you get tired, the number stops meaning what it meant on the first rep.
It is also the easiest place to fool yourself. From inside the rep you cannot see where your chin is, and it is easy to believe it got there. Film a set from the side and you can check every rep instead of trusting the feeling.
PULL UP KING draws a judging line, a dashed line just below the bar at about elbow height, and moves the number only when your chin crosses it. The line sits below the bar on purpose: camera angle and joint detection both carry a little error, and judging exactly at the bar would throw away good reps. That also means the app's count is not the same as a strict chin-over-the-bar count. A rep can cross the judging line while the chin is still a little under the bar.
The app watches one point, your chin. It does not judge swing, and it does not check that your arms straightened at the bottom, so those two are on you. A rep that stalls under the line does not count, swung or not. The line is set when the set starts and stays the same for every rep in it, not just the ones you remembered to check.
Common faults and how to fix them
| Fault | What it looks like | Fix |
|---|---|---|
| Half rep | Eyes or nose reach the bar, chin does not | Pull the bar to the chest; count only chin-over reps |
| Reaching with the chin | Head pokes forward to sneak over | Keep the head neutral; the chin follows the chest |
| Swinging | Legs pendulum on every rep | Glutes tight, ribs down, let the hang settle before each pull |
| Shrugging | Shoulders end up next to the ears | Pull the shoulder blades down first, before the elbows bend |
| Flared elbows | Elbows point out to the sides at the top | Drive elbows down and back toward the ribs |
| No lockout | Arms never straighten at the bottom | Finish each rep at a dead hang, even if it costs a rep |
| Dropping | Falling through the lowering | Two seconds down; the lowering is half the rep |
Fix one of these at a time. If you change one thing and film the next set, you can see whether that change is what made the difference.
Let the camera judge the rep
PULL UP KING counts a pull-up only when your chin crosses the judging line, and it uses the same line for every rep in the set.