Squat Jumps

What the squat jump actually trains

A squat jump is a plyometric exercise in which you dip into a quarter squat and immediately jump vertically as high as you can, then land and reset.

The gluteus maximus, quadriceps and hamstrings produce the force, the gastrocnemius and soleus finish the extension at the ankle, and the trunk stays braced so that the force made at the hips is transmitted to the floor rather than absorbed by a soft midsection.

The quality being trained is power, which is force multiplied by velocity: the ability to express your existing strength quickly. It is a real athletic quality and it declines when you never train it.

What a squat jump is not is a leg builder. Each rep loads the muscle for a fraction of a second, the eccentric portion is minimal by design, and a full set involves less total mechanical work than a single set of ten squats. Plyometrics are power and conditioning work. Putting them in a programme as though they were leg training gets people nowhere for months at a time.

There is a useful thing a squat jump does that a box jump does not: it tells you the truth. On a box, the surface you land on is partly a function of how far you tuck your knees. In a squat jump, your hips go as high as they go, and the only way to jump higher next month is to be more powerful.

That makes it the better default plyometric for most people, and the lower risk one, since there is nothing to trip over and no elevated landing.

Setting up and executing

Stand with the feet hip to shoulder width, on a surface with some give if you have one.

Set the chest up and brace the abs. A loose trunk leaks force.

Dip quickly into a quarter squat, swinging the arms back as you go. The dip should be fast and shallow. It is not a squat with a jump on the end; it is a loading action that stores elastic energy in the tendons and briefly stretches the muscles before they shorten.

Reverse without pausing at the bottom. Any pause bleeds off the elastic contribution.

Drive the arms forward and up while the hips, knees and ankles extend fully. Reach as high as you can with the whole body.

Land on the whole foot, bending the knees and hips to absorb quietly. Stand up, reset, and take your time before the next rep.

The mistakes that cost you the most

Dipping too deep is the most common technical error. People assume a deeper dip means a bigger jump, and past a certain point the opposite is true, because a deep descent takes too long and the stored elastic energy dissipates before you use it. Kubo and colleagues' work on squat depth is about muscle growth rather than jumping, and the distinction matters: depth is what you want under a loaded bar, speed is what you want in a jump.

Ignoring the arms costs a surprising amount of height. The arm swing is not decoration; it adds meaningfully to the force applied to the ground.

Landing stiff legged sends the impact straight into the knees and hips rather than into the muscles that should be absorbing it. Schoenfeld's review of squatting kinematics and kinetics describes how joint forces distribute through a flexed knee, and the practical version is simple: land soft, land quiet.

Long sets for conditioning are self defeating. Every rep after fatigue arrives is lower and technically worse, so you practise the thing you wanted to improve, badly.

And expecting bigger legs will disappoint you. Roig and colleagues found eccentric training superior for strength and mass gains, and a squat jump deliberately minimises the eccentric.

Sets, reps and rest by goal

Short sets, long rest, high quality. Always.

For muscle gain, three sets of three to five with two minutes rest, treated as a power addition beside your leg volume rather than a part of it. For strength and power, four sets of three to five with three minutes. In a fat loss phase, three sets of six to ten with ninety seconds, on the understanding that you have converted the exercise into conditioning.

The long rest is not laziness. Power output falls off before you feel tired, so the fourth rep of a short rested set is already substantially worse than the first.

This is one of the few exercises where the usual advice about pushing close to failure is exactly wrong. Refalo and colleagues found that stopping short of failure produces comparable hypertrophy to reaching it, which is useful in general. Here you should not go anywhere near failure. The set ends when jump height drops, which is usually well before your legs feel anything.

One or two sessions a week is enough, always at the start.

Schoenfeld and colleagues' dose response work on weekly hard sets tells you where to put your effort if size is the goal, and it is not here.

Where it fits in your split

First in a lower body session, before anything heavy, while you are completely fresh.

On push, pull and legs it opens legs day. On a bro split it goes at the very start of leg day. On an upper and lower split it precedes the squats and hinges. On a full body programme it is a two minute opener. On a bodyweight programme it is the power movement in an otherwise slow session.

Putting jumps at the end of a session is a common error. By then your legs are fatigued, your jumps are low, and the only thing you are training is your tolerance for being tired.

There is also a reasonable argument for using squat jumps as a readiness check. If your jumps feel heavy and low, the heavy squats that follow are unlikely to go well either.

Liao and colleagues' meta-analysis found that resistance training, unilateral and bilateral alike, improves jump performance. The heavy work in your programme is doing most of the job. The jumps refine it.

Variations worth knowing

The box jump is the same movement performed onto a platform, which adds a knee tuck and an elevated landing without adding much training value.

The broad jump sends you forward instead of up, which trains horizontal force production and transfers well to sprinting.

The band jump squat adds an elastic band over the shoulders, which increases resistance as you extend and makes the top of the jump harder.

The dumbbell jump squat adds load in the hands, which raises force and lowers velocity. Light is the word here; heavy loaded jumps are a specialised tool and an easy way to get hurt.

The split squat jump has you land in a lunge and swap legs in the air, which introduces a single leg element and a good deal more coordination.

And the countermovement jump measured against a wall or a target turns the same movement into a test, which is the honest way to know whether the training is working.

What the evidence says

Liao and colleagues' systematic review and meta-analysis of unilateral versus bilateral resistance training found improvements in jump height, linear speed and change of direction across both approaches, supporting the view that jump ability is built substantially by resistance training rather than by jumping alone.

Schoenfeld's review of squatting kinematics and kinetics describes the joint forces through the squatting pattern, which underpins both the quarter squat dip and the soft, absorbed landing.

Kubo and colleagues compared squat training at different depths and found depth influenced which lower limb muscles grew, a reminder that the quarter squat depth used in a jump is chosen for speed rather than for muscle growth.

Schoenfeld and colleagues' comparison of concentric and eccentric muscle actions found eccentric work produced at least equal and often greater hypertrophy, explaining why a movement that minimises the eccentric is a poor size builder.

Roig and colleagues reached the same conclusion in their meta-analysis of eccentric versus concentric training.

Schoenfeld and colleagues' dose response analysis of weekly hard sets shows where hypertrophy comes from, which is the compound work that jumps sit beside rather than replace.

Refalo and colleagues found training close to failure was not required for hypertrophy, and here you should stay further from failure still.

Common questions

How is this different from a band jump squat?

Barely at all in terms of the movement; the band version is the same jump with an elastic band adding resistance. What the band changes is where the resistance is highest, since it stretches as you extend and therefore loads the top of the jump most. It also makes the landing harder, because the band pulls you back down. If you have no band, you are missing very little.

Do squat jumps build muscle?

No, not to any useful degree. The time under tension per rep is a fraction of a second and the eccentric is deliberately minimised. Use them for power output and use squats, presses and hinges for size.

How deep should the dip be?

About a quarter squat, and fast. Depth costs time, and time lets the stored elastic energy dissipate. If you find yourself pausing at the bottom, you have gone too deep.

Can I do them for high reps as conditioning?

You can, but understand that you have changed the exercise. Once jump height falls, you are doing tiring repetitions of a low quality jump. If power is the goal, keep sets to five reps or fewer.

Should I hold weights?

Only light ones, and only occasionally. Adding load lowers velocity, which is the quality you came for, and heavy loaded jump squats put a hard landing on a spine that is already carrying weight.