Single Leg Depth Jump: A Complete Guide

Quick Intro

Single Leg Depth Jump, also called the One Leg Drop Jump, is a one-leg drop-and-jump drill performed by stepping off a box onto one leg, absorbing the landing and immediately exploding upward or forward off that same leg. It needs an elevated surface, such as a low box, though a dedicated box isn’t essential, since a step or curb can substitute at very low heights. This is one of the most demanding single-leg jumps, asking one leg alone to do what a depth jump splits across two.

Equipment Needed

Single Leg Depth Jump needs a low box or step, kept conservatively low given the single-leg landing this exercise demands.

Why Single Leg Depth Jump Matters

Absorbing the drop and redirecting it explosively asks the front of the thigh (quadriceps, rectus femoris and vastus lateralis) and glutes (gluteus maximus and gluteus medius) to produce and control an unusually large amount of force on a single leg, while the back of the thigh (hamstrings, biceps femoris) and calf (gastrocnemius and soleus) help absorb the drop and immediately redirect it into the explosive finish. Power is the main demand and a maximal one, with strength and balance close behind, since a single leg has to absorb a drop and redirect it explosively with no second leg to help.

When to Do It

Because this exercise asks for completely fresh legs and full focus, it belongs at the very start of a session, right after a general warm-up and before any other lower-body work. It’s one of the most demanding single-leg movements, not a way to warm up for anything else.

Anyone with a current knee, ankle or hip condition should avoid this exercise until fully resolved, since the entire drop-and-redirect sequence concentrates the force onto one leg with no second leg to share it. Single Leg Box Jump should already feel fully controlled before adding a drop from an elevated surface on top of it.

Getting Ready

A general warm-up followed by a set of Single Leg Box Jump confirms the underlying single-leg landing and jump skill is solid before adding a drop. A few slow, controlled single-leg balance holds, checking that the standing leg feels stable, are worth doing before asking that same leg to absorb a drop.

Step-by-Step Instructions

Setup. Stand on top of a low box on one leg, the other leg lifted slightly.

Step off. Step off the box, landing on the same leg with control rather than jumping off.

Redirect. The instant the foot touches down, drive upward or forward into an explosive jump off that same leg.

Land. Land the jump on the same leg with a soft, absorbing knee and hip bend.

Reset. Bring both feet together and let the breathing settle before climbing back onto the box.

How Many, How Often

Single Leg Depth Jump is dosed per leg, in a very small number of fresh, maximal-effort reps, since the quality of the redirect drops off quickly and each leg needs its own dedicated practice.

Keeping the box height conservative matters more here than raising it quickly, since a collapsing single-leg landing on too tall a box risks an injury.

Modifications and Variations

Single Leg Depth Jump has two easier steps.

Single Leg Box Jump removes the drop entirely, jumping directly onto a box from the ground on one leg instead. Depth Jumps remove the single-leg demand, using both feet together for the drop and redirect.

Progression path: Depth Jumps and Single Leg Box Jump mastered separately as the two foundations, then this exercise once both feel fully controlled and can be safely combined on one leg.

Common Mistakes to Avoid

Using too tall a box for the current level. A box too high for a single leg to safely absorb often results in a collapsing knee or a rushed, unstable redirect. Keeping the box conservatively low and raising it only in small increments keeps this exercise safe.

Pausing between the landing and the redirect. Resetting fully after the drop before exploding into the next jump wastes the stored elastic energy the landing just built up. Redirecting into the jump the instant the foot touches down is the skill this exercise trains.

Neglecting the weaker leg. Spending more practice time on the naturally stronger leg leaves the other side underprepared for a demand this large. Giving both legs equal, dedicated attention closes that gap before it becomes an imbalance.

After Your Set

The quadriceps and glutes absorb an unusually large amount of single-leg force through even a short set on each side. Placing the top of the trailing foot on a low bench behind the body and gently lowering the hips, without arching the lower back, stretches the hip flexor of that leg. Lying flat on the back, looping a towel around the working foot and drawing that straight leg up toward the ceiling releases the back of that same thigh.

Going Deeper

Fresh legs matter enough for this exercise that it belongs at the very start of a session, ahead of anything else that could take the spring out of them first. Single Leg Box Jump makes the essential lead-in, since the drop adds a lot of difficulty on top of a skill that needs to already feel automatic.

Progress here tends to stall when the redirect quietly slows down on one leg even though the other leg’s redirect stays fast. That’s usually a sign that leg’s landing control hasn’t caught up, and dropping box height on just that side until the redirect speeds back up typically restores balance faster than pushing both legs through the same height.

Someone new to this exercise typically needs a solid, separately mastered Single Leg Box Jump and comfortable single-leg balance before adding a drop from an elevated surface becomes the safe next step.

How to Know You’re Improving

1. The redirect happens with minimal ground contact time on both legs
2. The landing knee tracks straight over the toes on every rep, with no inward collapse
3. Both legs can complete the same rep count with a similarly fast, controlled redirect
4. Box height can increase on both sides while the redirect stays just as quick

Comparing how fast and controlled the redirect is between the two legs, not just whether the rep gets completed, is the more useful way to judge progress here.

Muscles Worked

• Rectus Femoris (one of the quadriceps at the front of the thigh, absorbing the whole drop on one leg and reversing it immediately)
• Vastus Lateralis (a quadriceps muscle on the outer thigh, sharing that single-leg absorption and drive)
• Gluteus Maximus (the largest glute muscle, extending the hip to redirect the landing force upward)
• Gluteus Medius (a smaller glute muscle at the side of the hip, holding the pelvis level under a landing force the pair would normally share)
• Biceps Femoris (the outer hamstring at the back of the thigh, decelerating the hip and then assisting the drive)
• Gastrocnemius (the larger calf muscle nearer the surface, keeping the ankle rigid through the hardest contact in this kind of training)
• Soleus (a deeper calf muscle beneath the gastrocnemius, taking the remainder of that single-leg ankle load)

FAQ

Why is this dosed per leg with such a small number of reps? Because the quality of the redirect drops off quickly with fatigue, and each leg needs its own dedicated practice rather than sharing a combined total that could hide a weaker side.

Is this harder than Single Leg Box Jump? Yes. Adding a drop before the jump asks the leg to absorb far more force in a shorter time than jumping directly onto a box from the ground, which places Single Leg Box Jump a step below it.

How low should the box be? Conservatively low, especially when starting out. Since one leg alone has to absorb the entire drop, a box height that would feel manageable for a two-footed depth jump can be risky here.

Should the jump after the landing go up or forward? Either. Upward is the simpler place to start, since the landing stays over the same spot. A forward jump adds distance to control and suits training for sprinting or bounding.

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This is part of the jump-and-land family, the drop-jump step up from Single Leg Box Jump and the unilateral counterpart to Depth Jumps.