A tuck jump is a plyometric jumping exercise where the athlete jumps vertically and drives both knees toward the chest at the peak of the jump before landing and immediately jumping again. The brief moment at the peak of the jump — where the body is fully airborne with the knees tucked to the chest — gives the exercise its name and its specific training value.
What the Tuck Position Specifically Adds
The tuck jump is not simply a vertical jump with extra steps. The knee-to-chest tuck during the flight phase creates specific demands that a standard vertical jump does not:
Greater power requirement: Lifting the knees to the chest requires the hip flexors to produce rapid flexion force while the body is completely airborne against gravity. This demand requires greater total impulse (force applied over time) from the jump to generate the airtime needed for the tuck. Athletes who cannot jump high enough for the tuck to occur with adequate time default to a shallow tuck — a reliable indicator that the jump power is insufficient.
Total body coordination: The tuck jump requires the upper body (arm drive), the core (holding the tuck position), the hip flexors (driving the knees up), and the lower body (generating the jump) to work in a coordinated sequence within less than one second. This coordination demand develops the athletic total body power that isolated exercises cannot replicate.
Rapid cycle time: The tuck jump is typically performed as a continuous series of jumps, requiring the landing to immediately transition to the next jump without pause. This reactive component — the brief ground contact between jumps — develops the stretch-shortening cycle of the entire lower limb, which is the primary plyometric quality that transfers to sport performance.
Landing quality testing: The tuck jump specifically stresses the landing mechanics in a fatigue context (repeated jumps, high heart rate). Poor landing mechanics (knee valgus, stiff landing, forward trunk collapse) that might be concealed during single jumps are reliably exposed during repeated tuck jumps. This makes the tuck jump a useful assessment tool for identifying athletes at elevated ACL injury risk, as covered in the deceleration training exercises article on this site.
Muscles Targeted
Primary during the jump:
- Quadriceps (knee extension during the push-off)
- Gluteus maximus (hip extension during the push-off)
- Gastrocnemius and soleus (plantarflexion at toe-off)
Primary during the tuck:
- Iliopsoas and rectus femoris (rapid hip flexion driving the knees up)
- Rectus abdominis and hip flexors (holding the tuck position against gravity)
During landing (eccentric absorption):
- Quadriceps (eccentric knee flexion control — preventing knee buckling)
- Gluteus maximus and medius (eccentric hip absorption — preventing valgus)
- Gastrocnemius and soleus (ankle absorption)
The landing phase muscles work eccentrically under the highest forces of the exercise. As covered in the deceleration training exercises article on this site, eccentric control during landing is the primary determinant of injury risk during plyometric training.
Step-by-Step Technique
Starting Position
- Stand with feet shoulder-width apart
- Adopt the athletic position: slight knee bend, hips slightly back, weight on the balls of the feet
- Arms at the sides or very slightly forward
The Countermovement
- Quickly bend the knees and hips into a quarter-squat position (approximately 60 to 90 degrees of knee flexion)
- Simultaneously swing the arms downward and behind the body
- The countermovement should be rapid (not a slow controlled descent) — the stretch-shortening cycle requires the transition from the downswing to the jump to be as fast as possible
The Jump
- Drive explosively upward by extending the knees, hips, and ankles simultaneously
- Simultaneously drive the arms upward and forward to generate additional upward momentum
- At toe-off, the entire body is fully extended
The Tuck
- Once airborne, drive both knees toward the chest simultaneously
- The heels should come close to or touch the buttocks at the peak of the tuck
- The hands can briefly touch the knees or shins at the peak position (some athletes do this as a technique cue; others find it interferes with the arm position for landing preparation)
- The spine flexes slightly at the peak of the tuck — this is the natural consequence of the hip flexion and is acceptable
The tuck timing:
The tuck must be initiated immediately on leaving the floor — there is no pause in the upward extension before the tuck begins. The sequence is: leave floor → immediately drive knees up → reach maximum tuck at peak height → immediately extend for landing.
Landing Preparation
- Before landing, the legs must extend back to a landing-ready position
- The feet should be at or very slightly wider than shoulder-width at landing
- The arms return to the sides or slightly forward as a counter-balance for the landing
The landing extension is critical: The legs must be extended and ready for landing before the feet contact the floor. Landing with knees tucked concentrates all the impact forces in the already-flexed position, eliminating the absorption capacity of the full knee extension range and dramatically increasing injury risk.
The Landing
- Contact the floor with the balls of the feet first (not the heels)
- Allow the ankles, knees, and hips to flex progressively to absorb the landing
- Land with the knees over the toes (not collapsing inward)
- The landing should be as quiet as possible — sound indicates force that has not been absorbed through the muscles
The Immediate Re-Jump
- The landing from each tuck jump should transition immediately to the next jump
- The ground contact time should be as brief as possible — the aim is a spring-like rebound rather than a pause and reset
- The countermovement of the next jump begins as the feet contact the floor from the previous landing
The Landing Mechanics Emphasis
The Sportsmetrics research group developed the tuck jump as a specific assessment and training tool for ACL injury prevention. Their work identified that female athletes performing tuck jumps showed specific biomechanical patterns (knee valgus, asymmetric foot landing, trunk forward lean, insufficient knee flexion at landing) that predicted elevated ACL injury risk.
This research background means the tuck jump has a dual role:
As a training exercise: The repeated jumps develop lower body power and plyometric capacity.
As a landing mechanics screen: The fatigue stress of repeated tuck jumps reveals landing mechanics that poor movement habits make more likely under fatigue — precisely the conditions of late-game high-risk situations in sport.
The specific landing mechanics to monitor:
Knee valgus (inward collapse): The most important marker. The knees should track over the second and third toe throughout the landing. Any inward collapse of the knees during landing is the primary risk factor for ACL injury and should be corrected before tuck jump volume is increased.
Asymmetric landing: Both feet should contact the floor simultaneously and equally. An athlete who consistently lands more heavily on one side has an asymmetric deceleration pattern that warrants investigation.
Thigh position at landing: The thighs should be parallel or nearly so at landing. Thighs that are significantly internally rotated or adducted at contact reflect the hip strength deficit that contributes to valgus.
Landing sound: Loud landings indicate force that has not been effectively absorbed through the muscles and joints. Quiet landings indicate efficient absorption.
Common Errors and Fixes
Error 1: Shallow Tuck (Knees Not Reaching the Chest)
What it looks like: The knees only reach hip height rather than chest height during the flight phase.
Why it happens: Insufficient jump height (not enough airtime for a full tuck) or insufficient hip flexor speed (the knees cannot reach the chest in the available airtime).
Fix: First check the jump height — if the body barely leaves the floor, the jump power is the limiting factor and lower-level plyometrics should be developed first. If the jump height is adequate but the tuck is shallow, practice the standing knee drive (standing hip flexion drills to develop the hip flexor speed for the tuck) before combining with the jump.
Error 2: Knees Collapsing Inward on Landing
What it looks like: The knees cave inward (valgus) at the moment of foot contact during landing.
Why this matters: This is the most injury-relevant error in tuck jump training and the primary screening indicator for ACL injury risk in the Sportsmetrics research.
Fix: Cue the athlete to think of landing with the knees wide and over the toes. A resistance band above the knees (providing a valgus challenge that the athlete must resist) during lower-level jump training develops the hip abductor activation that prevents valgus. As covered in the lateral band walk exercise article on this site, the gluteus medius is the primary muscle preventing knee valgus and must be specifically developed alongside plyometric training.
Error 3: Landing With Straight Legs (Stiff Landing)
What it looks like: The knees and hips barely flex during landing, with the body absorbing the landing forces through rigid joints rather than the muscles.
Why this matters: Stiff landings concentrate the impact forces at the joint structures (specifically the ACL and the tibial plateau) rather than distributing them through the eccentric muscle chain.
Fix: Cue the athlete to “stick the landing” with the hips dropping — the landing position should look like the bottom of a quarter-squat. The silent landing drill (practicing landings from a box with the explicit goal of being as quiet as possible) develops the absorption habit.
Error 4: Legs Not Extended Before Landing
What it looks like: The athlete lands with the knees partially tucked — the legs have not fully extended from the tuck position before foot contact.
Why this happens: The tuck is initiated too late, or the jump height is insufficient for the full tuck-and-extend cycle.
Fix: Either increase jump power to generate more airtime, or reduce the tuck depth (less acute knee flexion in the tuck) to allow more time for the extension before landing.
Error 5: No Immediate Re-Jump (Pause Between Jumps)
What it looks like: The athlete pauses in the landing position before beginning the next jump, eliminating the reactive quality of the exercise.
Why this matters: The stretch-shortening cycle benefit of the tuck jump comes from the elastic energy stored during the landing being immediately used in the next jump. A pause dissipates this energy and converts the exercise into a series of separate jumps rather than a reactive plyometric sequence.
Fix: Cue the athlete to think of the landing as the beginning of the next jump rather than the end of the current one. The contact time between jumps should be as brief as possible.
Progressions and Regressions
Regression 1: Vertical Jump (No Tuck)
For athletes who have not yet established plyometric training, the standard vertical jump without a tuck develops the jumping and landing mechanics before the tuck is added.
Entry criteria for tuck jump: 10 consecutive vertical jumps with consistent knee-over-toe landing mechanics.
Regression 2: Standing Knee Drive (Tuck Without Jump)
Standing and driving both knees toward the chest without jumping — a floor-based hip flexor speed exercise that develops the tuck motion before it is combined with the jump.
- Stand with both feet on the floor
- Drive both knees toward the chest simultaneously as rapidly as possible
- Balance briefly on one foot during the drive, then return both feet to the floor
- 3 sets of 10 drives
Standard Tuck Jump
As described in the full technique section above.
Sets and reps: 3 sets of 5 to 8 tuck jumps
Progression 1: Tuck Jump With 90-Degree Turn
The athlete performs a tuck jump and rotates 90 degrees during the flight phase, landing facing a new direction.
This adds a rotational coordination demand and specifically develops the spatial awareness during flight that is relevant to gymnastics, diving, and aerial sports.
Sets and reps: 3 sets of 4 per direction
Progression 2: Tuck Jump Over Obstacle
Performing the tuck jump over a low hurdle or marker adds a horizontal distance requirement alongside the vertical jump.
Sets and reps: 3 sets of 5 to 8
Progression 3: Continuous Tuck Jumps for Time
Maximum quality tuck jumps for 15 to 20 seconds continuously. Tests the ability to maintain mechanics under fatigue — the condition under which game-situation landings occur.
Sets: 3 sets of 15 to 20 seconds with 60 to 90 seconds rest
Programming Tuck Jumps
As part of an athletic development programme:
The tuck jump sits within the plyometric training category alongside clap push-ups (covered in the clap push ups article on this site), box jumps, and broad jumps. Plyometric training principles apply:
- Perform when fresh (at the start of a session, before strength training)
- Full recovery between sets (60 to 90 seconds minimum)
- Quality over volume — stop when technique degrades
- 2 to 3 sessions per week maximum
- Begin with low volume (3 sets of 5) and build to moderate volume (4 sets of 8) over 4 to 6 weeks
As an ACL injury prevention exercise:
Following the Sportsmetrics model, tuck jumps are used both as a training exercise and as a quality assessment. In this application:
- Perform 10 consecutive tuck jumps
- Have a partner or coach observe the landing mechanics for the errors listed above
- Use the assessment to direct the specific strengthening work needed (hip abductor strengthening if valgus is present, eccentric quad work if stiff landing)
- Reassess every 4 weeks to track mechanics improvement
Combined with deceleration training:
As covered in the deceleration training exercises article on this site, landing mechanics developed in tuck jump training directly transfer to the deceleration quality needed for sport safety. Programme tuck jumps alongside the Level 1 and Level 2 deceleration drills for a comprehensive lower limb plyometric and deceleration foundation.
Sample plyometric session including tuck jumps:
- Box step-off landing: 2 x 8 (mechanics warm-up)
- Vertical jump: 2 x 6 (basic jump pattern)
- Tuck jump: 3 x 6 (full plyometric)
- Broad jump: 3 x 5 (horizontal power)
- Reactive deceleration drill: 3 x 5 per side (sport-specific application)
Frequently Asked Questions
What is the difference between a tuck jump and a box jump?
A box jump jumps onto an elevated surface (a box or platform), testing and developing the horizontal-to-vertical power transfer and the landing on a stable elevated surface. A tuck jump jumps vertically from and to the same surface, with the added tuck phase that develops hip flexor speed and total body coordination during flight. Both are valuable plyometric exercises with different emphases.
Are tuck jumps appropriate for beginners?
Tuck jumps require adequate jump power for the airtime needed for the tuck, and adequate landing mechanics for the repeated high-impact landings. For beginners who have not yet established plyometric training, the vertical jump (without tuck) is the appropriate starting point. Begin tuck jumps once 10 consecutive vertical jumps can be performed with consistent quiet, knee-over-toe landings.
Can tuck jumps be done every day?
No. As with all plyometric exercises, tuck jumps require 48 hours minimum recovery between sessions. The high-impact landing forces and the eccentric loading of the lower limb during repeated jumps produce significant neuromuscular fatigue that requires recovery time. Daily tuck jump training at meaningful volumes is likely to increase injury risk rather than reduce it.
Do tuck jumps help with vertical jump performance?
Yes. Tuck jumps develop the stretch-shortening cycle, the hip flexor speed, and the total body coordination that contribute to vertical jump performance. Athletes who regularly train tuck jumps alongside other plyometric exercises typically show improvements in their vertical jump test results over 8 to 12 weeks of consistent training.