High Knees: How to Do Them, Muscles Worked and Common Mistakes
How to do high knees with proper form and posture. Muscles worked, why they beat jogging on the spot, the mistakes that turn them into a shuffle, and how to use them in a workout.
By Nadia Popescu, Strength & Conditioning Writer · Updated 8 September 2026
The rack pull is a deadlift that starts partway up, with the bar resting on safety pins or blocks somewhere between mid-shin and just under the kneecap. You pull from there to a full lockout. It has a reputation as the ego lift of choice, and that reputation is earned by people who set the pins at mid-thigh and load 250kg to shrug it four inches, but the exercise itself is a serious tool for building back thickness, grip and lockout strength. The difference is entirely in the setup.
You need a power rack or squat stand with adjustable safety pins, a barbell and plates. Blocks work too and work better, if you have them.
The pin height rule that makes this work
Set the pins just below where your deadlift actually fails, not just below where it feels heavy. If you stall at mid-shin, put the pins at mid-shin. If you stall at the knee, put them at the knee. Setting them higher than your sticking point trains a range you were never struggling with, which is how rack pulls got their reputation.
The rack pull is a posterior chain lift with the knee-dominant portion removed, so the emphasis shifts sharply upwards.
Your quads are largely spectators. That is the trade you are making, and it is the reason a rack pull complements rather than replaces the conventional deadlift.
Overloading the lockout. If your deadlift dies in the top third, rack pulls let you spend time under a load your full lift cannot reach, in exactly the position where you fail.
Back thickness and grip. Sets of five with a genuinely heavy bar build the traps, lats and hands in a way that lighter, longer-range work does not.
Training around a bad bottom position. Stiff ankles, a long femur or a tender lower back at full depth can all make floor pulls miserable. Starting higher keeps you training the hinge while you sort the rest out.
Confidence with heavy weight. Handling a bar heavier than your deadlift teaches your bracing and your nerve. That sounds soft and is not; a lot of failed deadlifts are failures of position rather than strength.
Here is the honest limit. Partial reps in a shortened position are the least productive kind for muscle growth, and the evidence has been pushing the other way: lengthened partials, done in the stretched portion of the range, produce adaptations comparable to full range training (lengthened partial repetitions study). A rack pull is the mirror image of that. Use it for load exposure, lockout work and back thickness, and do not expect it to grow your hamstrings.
Pins set too high. The single most common error and the reason for the exercise's reputation. Above the knee there is barely any hip extension left to train, so you have built an expensive shrug.
Loading it like a status symbol. Your rack pull should be somewhere near 110 to 130 percent of your deadlift, not double it. If you cannot hold a flat back at the top, the bar is too heavy regardless of what it looks like on Instagram.
Letting the bar drift. Any daylight between the bar and your legs puts a longer lever on your lower back. Pull the bar into your thighs, hard, and keep the lats engaged all the way to lockout.
Bouncing off the pins. The rebound gives you free momentum for the next rep and hides the fact you are no longer generating force from a dead stop. Let the bar settle, breathe, brace, pull.
Hyperextending at the top. Leaning back at lockout is not a bigger lift, it is a compression problem waiting to happen. Stand up straight, squeeze the glutes, stop.
Doing them instead of deadlifting. Rack pulls supplement a full pull. If you have replaced the deadlift entirely, the thing you are avoiding is probably the thing you need most.
Rack pulls are a heavy accessory, not a max attempt.
Once a week is plenty, and pair them with rows and pull-ups rather than putting them next to a heavy deadlift day. The NHS recommends strength work covering all major muscle groups on at least two days a week, and a heavy pull plus an upper back session covers most of that between them.
You will need a rack with solid pins and a bar that tolerates repeated loading against steel. Our best power cage UK guide covers racks with proper adjustable safeties, and the best barbell guide has bars that will not mind the abuse. If your grip gives out before your back does on the heaviest sets, lifting straps are the fix.
Traps, lats and the whole upper back take the brunt, along with your glutes, hamstrings and spinal erectors driving and holding the lockout. Grip works hard because the bar is heavy and stays in your hands for the full set. Quads barely feature, since you have removed the part of the lift where the knees do most of the work.
Just below the kneecap for most people. Above the knee turns it into a shrug with a bar path you can barely call a pull, and on the floor it stops being a rack pull. If your sticking point is at mid-shin, set the pins at mid-shin instead: the useful height is the one just under where you fail.
You will move more weight, which is not the same thing. Removing the bottom third of the range takes away the hardest mechanical position, so the number goes up. The lift is easier per kilo and harder in absolute load, which is exactly why it is useful for overloading the back and grip.
They build back thickness and grip well because you can hold a heavy bar for full sets. For pure muscle growth they are a supplement rather than a foundation, since partial reps in the shortened position are the least effective kind. Do them alongside rows and full deadlifts, not instead of them.
No more than any heavy hinge, provided you brace properly and keep the bar against your legs. The risk comes from the ego load. People stack a rack pull with 40 percent more than their deadlift, let the back round, and blame the exercise.
Block pulls are better if you have blocks. Pulling off pins lets the bar bounce and rattle, and the pins fight you slightly on the way down. Blocks keep the plate loading and the bar behaviour closer to a real deadlift. Pins are what most home gyms have, so pins are fine.
How to do high knees with proper form and posture. Muscles worked, why they beat jogging on the spot, the mistakes that turn them into a shuffle, and how to use them in a workout.
How to do the Meadows row with a landmine setup. Muscles worked, the grip and stance that make it work, common mistakes, variations and a sets and reps plan.
How to do a dumbbell front raise properly. Muscles worked, why it is not a replacement for pressing, the four mistakes that ruin it, variations and a sets and reps plan.
How to do a suitcase carry with a dumbbell or kettlebell. Muscles worked, the benefits for your obliques and grip, common mistakes, variations and how far to walk.
Best Exercise is a participant in the Amazon EU Associates Programme, an affiliate advertising programme designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.co.uk. As an Amazon Associate we earn from qualifying purchases. This comes at no extra cost to you and never influences our independent reviews or rankings.