Chin-ups: technique and how they differ from pull-ups

How to perform a chin-up properly, what really separates it from the pull-up, the mistakes that stall progress and how many sets to run each week.

If you manage three pull-ups overhand but suddenly get five or six with an underhand grip, you are not unusual — that is how it goes for most people. The next question is always whether that makes the chin-up an easier and therefore lesser exercise.

It doesn't. It is a different movement, with a different shoulder angle and a different split of work between the back and the arms. What follows is the technique step by step, the mistakes that keep repeating, and a concrete set scheme.

What the exercise is and which muscles it works

A chin-up uses an underhand grip — palms facing you, hands roughly shoulder width or slightly narrower. The classic pull-up uses an overhand grip, palms facing away, hands at shoulder width or a little wider.

In both cases the lats do the bulk of the work. Muscle activation measurements generally show far less difference in the back between the two grips than people assume. What genuinely changes is the biceps contribution: the underhand grip puts the elbow in a position where the biceps can contribute a lot more, so the load spreads across more muscle.

Alongside the lats and biceps you get teres major, lower traps, rhomboids, brachialis and the forearms holding the bar. The trunk works isometrically to stop the body swinging. Add all that up and most people get one to three more reps underhand than overhand at the same bodyweight.

The other difference is at the shoulder. Underhand, the upper arm stays closer to the ribs and the movement travels more front-to-back than out to the side, which suits some shoulders far better. The trade-off is a bit more load through the elbow and the inner forearm.

How to do it

Take the bar underhand, palms towards you, hands shoulder width. Wrap the thumb around the bar rather than hooking it with an open hand.
If you can't reach the bar standing, step up from a low bench instead of jumping — a jump wastes the first few centimetres of the rep.
Before you pull, set the shoulders down away from the ears and slightly back. From a shrugged dead hang you have nowhere to start.
Brace the abs, squeeze the glutes, keep the legs slightly in front with ankles crossed. The body should be one line, not a pendulum.
Drive the elbows down towards the ribs rather than pulling the hands to your face. Think about pushing the floor behind you with your elbows.
Go until the chin clears the bar and the chest comes close to it. Don't crane the neck to get the chin there.
Hold the top for half a second, then lower under control for 2–3 seconds until the elbows are fully straight.
Don't collapse at the bottom. Keep light tension through the back and start the next rep from there.

Breathe in before you pull, out towards the top of the rep or on the way down. If you have to hold your breath for the whole set, the set is too long for your current strength.

The most common mistakes

Half reps. The classic. You stop with the elbows at 90 degrees because that is where the next rep feels easy. The rep counts, but the back and biceps get maybe two-thirds of the work.
Kipping by accident. If your knees swing forwards and back, you are using momentum rather than the muscles you came for. Cross the ankles and squeeze them together.
Neck thrust. Pushing the head forward to clear the chin while the chest is still low. The neck adds nothing but tension.
Dead hanging passively. The shoulders ride up into the ears and the load falls on joints and tendons instead of muscle. Keep the shoulders active for the whole set.
A grip that's too wide or too narrow. A wide underhand grip tends to bite at the inner elbow. If it stings there, narrow it or switch to neutral handles.
Every set to failure. Chin-ups are demanding on the nervous system and on the elbows. Leave one or two reps in reserve on most sets.

Easier variations

If you can't do a single rep yet, the fastest route is the lowering phase. Step up onto a bench into the top position and lower for 3–5 seconds. Three to four sets of 3–5 lowers, twice a week, gets most people to their first honest rep within a few weeks.

Other options that genuinely work:

Resistance band looped over the bar, foot or knee in the loop. Once you get 8 reps with one band, move to a thinner one.
Foot assistance. A bench under the bar, one foot on it, toes helping just enough to get through the sticking point.
Inclined chin-up. Bar set at waist height, heels on the floor, body angled. The more upright you are, the easier it gets.
Underhand lat pulldown. Same pulling pattern with a load you choose. Run 3 sets of 8–10 at around 60–70 per cent of bodyweight and track it upwards.

Harder variations

Once you hit 8–10 clean reps, it is time to add weight. A dipping belt with a plate or a weighted vest, 2.5 kg to start, then sets of 4–6. Jumps of 2.5 kg are plenty and won't wreck your technique.

If you have nowhere to hang a load, make it harder with tempo. A four-second lowering phase, a one-second pause at the bottom and another at the top turns a set of six into something else entirely. A pause halfway down, holding for three seconds with the elbows at 90 degrees, does the same job.

The advanced step is shifting weight gradually onto one arm — the other hand grips the working forearm or a towel over the bar and assists less and less over the weeks.

Alternatives if you have no equipment

Without a bar you can still train the same pulling pattern. The closest swap is a horizontal row: lie under a sturdy table or a low bar, grip the edge underhand, keep the body straight and pull the chest up. Same muscles, less load, and much easier to add reps to.

A band anchored in a doorway lets you pull from overhead in a kneeling position. It isn't a chin-up, but it keeps the back working until you get access to a bar. If you do have a gym, T-bar rows cover the horizontal pull and pair well with chin-ups in the same session.

For a home load, one-arm rows with a water container or a rucksack full of books, braced on a bench with the free hand, do the job.

Sets and reps

Working towards a first rep: 3–4 sets of 3–5 slow lowers, two or three times a week, plus one horizontal pull in the same session.

Intermediate: 3–5 sets of 4–8 reps, twice a week, with around three minutes between sets. For most people 8–15 total weekly sets of vertical pulling is enough.

Advanced: 4–5 sets of 3–6 reps with added weight, plus one finishing set at bodyweight taken close to failure. Track progress by total clean reps per session — when that number climbs week on week, the plan is working.

Who it suits and when to leave it alone

The chin-up is a good pick for anyone who wants stronger back and arms in one movement, and particularly for people whose shoulders complain during overhand pull-ups. Keeping the arm closer to the body often means a calmer shoulder over the same range.

If your shoulders are a recurring problem, don't rely on the grip change alone. Add face pulls as a counterweight and look at which parts of shoulder injury prevention are worth keeping permanently in your programme.

Park the exercise if you have an active elbow tendon flare-up that shows up as soon as you grip the bar, if you get sharp shoulder pain before the pull even starts, or if you are recovering from shoulder, elbow or wrist surgery without clearance to pull.

For older lifters the problem is rarely the chin-up itself but the dose — fewer sets, longer rests and more horizontal rowing usually sits better, which is covered in more depth in the piece on smart training at 50.

When to see a doctor

Get it looked at if elbow, shoulder or wrist pain lasts more than two weeks despite a break, if you feel pins and needles or weakness spreading down the arm, if the arm loses strength for no clear reason, or if the pain came on suddenly with a snapping sensation. Training through that kind of pain fixes nothing.

In short

Underhand and overhand both hammer the back; underhand gives the biceps far more work, which is why the reps come easier.
Full range, elbows down to the ribs, 2–3 seconds on the way down.
No reps yet? Slow lowers of 3–5 seconds, 3–4 sets of 3–5, twice a week.
Getting 8–10 reps? Add 2.5 kg and go back to sets of 4–6.
Elbow or shoulder pain that won't settle in two weeks isn't a technique issue — get it checked.