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By Mofilo Team
Published
You're doing pull-ups to build a bigger back, but your biceps keep burning out first. Or maybe you're trying to grow your arms, but you just feel it in your back. The difference often comes down to one simple adjustment. Understanding the correct pull up grip width for lats vs biceps is the key to unlocking the results you want, turning wasted effort into targeted muscle growth.
Let's get straight to it. The debate over pull up grip width for lats vs biceps is solved with simple anatomy. Your lats (latissimus dorsi) are huge muscles on your back responsible for pulling your upper arms down and towards your body. Your biceps are on the front of your arm and their main job is to bend your elbow. The grip you choose determines which muscle does most of the work.
For maximum lat activation, you want a wide, overhand grip. We're not talking about grabbing the furthest ends of the bar. The sweet spot is a grip about 1.5 times the width of your shoulders. If your shoulders measure 18 inches from edge to edge, your hands should be about 27 inches apart.
This wider grip places your arms at an angle that forces your lats to do the heavy lifting. Think of it like trying to pull a heavy barn door shut-you'd use your back, not just your arms.
For maximum bicep activation, you want a narrow, underhand grip. This is technically a chin-up. By placing your hands at shoulder-width or slightly closer with your palms facing you, you put your biceps in their strongest possible line of pull. The primary movement becomes elbow flexion, which is the bicep's home turf.
So the rule is simple:
Anything in between will be a mix of both, but now you can stop guessing and start pulling with purpose.

Track your pull-ups and accessory lifts. See your strength grow week by week.
You've heard the advice: "Go wide for a wide back." So you grab the bar as wide as you can, struggle for a few half-reps, and feel it more in your shoulders than your lats. You're not alone. This is the most common mistake people make, and it's holding back your progress.
Here’s why your ultra-wide pull-ups are failing you.
There's a point of diminishing returns. When your hands are excessively wide (more than 2x your shoulder width), you physically cannot pull through a full range of motion. You can't get a full stretch at the bottom or a full contraction at the top. Your lats are strongest in the mid-range of the pull, and an extreme grip limits your ability to work in that range. You end up doing partial reps that build more frustration than muscle, while putting unnecessary stress on your shoulder joints.
The pull-up should start from your back, not your arms. Most people initiate the movement by bending their elbows. This immediately turns the exercise into a bicep-dominant movement, regardless of your grip width. Your lats are left behind.
To fix this, hang from the bar and, before bending your arms at all, pull your shoulder blades down and back. Your body should rise an inch or two. This is called scapular retraction. *Then* you pull with your arms. This ensures your lats are engaged from the very first moment.
Doing half-reps where your arms never fully straighten is cheating yourself out of gains. The stretched position at the bottom of a pull-up is where you create the micro-tears in the muscle that lead to growth. If you only lower yourself until your arms are at a 90-degree angle, you're missing half the benefit.
Start every single rep from a dead hang with your arms fully extended. Finish every rep with your chin over the bar. It means you'll do fewer reps, but each one will be 100% more effective.
Stop overcomplicating it. You don't need 10 different grip variations. You need three, each with a specific purpose. Master these, and you'll have all the tools you need to build a powerful back and strong arms.
This is your primary back-building exercise. The goal here is width and thickness in your lats.
This is your go-to for building bigger, stronger biceps. It allows you to lift more weight and directly targets the bicep peak.
This is the most joint-friendly variation and a fantastic strength builder. It hits the lats, biceps, and the brachialis-a muscle that adds thickness to your arm.

Every rep and set logged. Proof you're getting stronger and building your back.
Feeling like this article isn't for you because you can't even do one pull-up? That's where everyone starts. A pull-up is an advanced bodyweight exercise. But you can get there in 4-8 weeks with a consistent plan. Don't just keep trying and failing. Follow this progression.
Before you can pull your body up, you need the grip strength to hold on. Simply hang from the pull-up bar with your arms fully extended. Your goal is to accumulate 60 seconds of hang time. You can do this in sets, like 3 sets of 20 seconds, or 4 sets of 15 seconds. Do this 3 times a week.
This is the most important step for learning to use your back. From a dead hang, without bending your arms at all, pull your shoulder blades down and back. Your body will rise 1-3 inches. Hold for a second, then lower back down. This small movement is the start of every good pull-up. Do 3 sets of 10-12 reps.
You are much stronger on the lowering (eccentric) portion of an exercise. Use a box or bench to get your chin over the bar. Then, as slowly as you can, lower your body down. Fight gravity the entire way. Aim for a 5 to 10-second descent. When you reach a full dead hang, get back on the box and repeat. Do 3-4 sets of 3-5 reps.
Loop a large resistance band over the bar and place one foot or knee in it. The band will provide assistance at the hardest part of the movement (the bottom). This allows you to perform full reps with good form. Start with a heavy band that lets you do 5-8 reps. As you get stronger, move to a lighter band. Once you can do 8-10 reps with a light band, you're ready to try your first unassisted pull-up.
You should feel a deep squeeze and tension in the muscles under your armpits and along the sides of your back. If you only feel a burn in your biceps during a wide-grip pull-up, you are initiating the pull with your arms. Focus on the cue "pull your elbows to your pockets."
No. The optimal grip for lats is about 1.5 times your shoulder width. A grip that is too wide shortens the range of motion and limits your lats' ability to fully contract. It also places unnecessary stress on your shoulder joints. Stick to the 1.5x rule for the best results.
For lat growth (hypertrophy), aim for 3-4 sets in the 6-12 rep range. For bicep-focused chin-ups, you can work in a slightly higher rep range, such as 3-4 sets of 8-15 reps. In both cases, the last 1-2 reps of each set should be very challenging.
A lat pulldown machine is a great tool, especially for beginners. It allows you to use less weight than your bodyweight and practice the movement pattern. You can apply the exact same grip width principles. However, pull-ups build more core strength and functional stability because you are moving your body through space.
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