Videos and sales pages sometimes suggest that one program or exercise can add 20 inches to your vertical jump in only a few months. That is an exciting promise, especially if your goal is to touch the rim or dunk a basketball.
It is also far outside the improvement reported for most people in controlled training studies.
Strength training, plyometrics, better jumping technique, and consistent recovery can improve vertical jump performance. However, the size of that improvement depends on your starting point, training history, body composition, testing method, and the quality of your program.
This article explains what research has found, why dramatic transformations occasionally appear online, and how to set a more useful vertical jump goal.
Training disclosure: This article provides general educational information, not an individualized training plan. Anyone with an injury, pain, medical condition, or uncertainty about exercise suitability should consult an appropriate healthcare or exercise professional before beginning a new program.
Can You Really Add 20 Inches to Your Vertical?
For most adults, adding 20 measured inches through one short training program is not a realistic expectation.
That does not mean meaningful improvement is impossible. Research supports several training methods for increasing jump performance. The typical changes reported across groups are much smaller than the most dramatic online claims.
A meta-analysis of plyometric training studies reported average improvements ranging from approximately 4.7% to 8.7%, depending on the jump test. For someone beginning with a 24-inch jump, that percentage would represent roughly 1.1 to 2.1 inches. That example illustrates the scale of the average effect, not a prediction for every athlete.
A more recent systematic review and meta-analysis also found that plyometric and resistance-training interventions improved vertical jump performance compared with routine training. The pooled results varied by training type and jump test.
These studies support a practical conclusion: structured training can help, but research does not provide a dependable promise that a particular person will gain a specific number of inches.
Why 20-Inch Transformations Appear Online
A dramatic before-and-after story can combine several changes that are not due to a single workout program.
A very low starting point
Someone who has never trained, has inefficient technique, or begins with low relative strength may have more room to improve than an experienced athlete.
Technique and testing differences
A standing jump, countermovement jump, and running approach jump are not interchangeable. Results can also change when someone switches from a wall test to a jump mat test, or from a no-arm-swing test to a full-approach test.
If the original and final measurements use different methods, the apparent improvement may exaggerate the actual training effect.
Growth and physical development
A teenager may become taller, stronger, and more coordinated during the same period as the training program. It can be difficult to separate training adaptations from normal development
Body-composition changes
An athlete who loses excess body fat while maintaining strength may improve power relative to body mass. However, weight loss does not automatically lead to a predictable increase in jump height, and aggressive dieting can reduce training quality and impair recovery.
Selective marketing
Affiliate pages and social posts tend to feature exceptional transformations rather than the full range of customer outcomes. A testimonial can describe one person’s experience, but it does not establish what the average buyer should expect.
What Determines Vertical Jump Performance?
Vertical jumping is not controlled by one muscle or one exercise. Performance reflects the interaction of several qualities.
Relative strength
Lower-body strength helps an athlete apply force against the ground. Stronger athletes often have a larger force-producing foundation, although maximum strength alone does not determine jump height.
A review of muscular strength and athletic performance found that greater strength can support jumping, sprinting, and change-of-direction ability. The important question is whether the athlete can express that strength quickly and efficiently.
Rate of force development
A jump happens quickly. Producing high force slowly is not enough. The athlete must generate useful force during the short time the feet remain in contact with the ground.
Explosive lifts, jumps, and other power exercises can help develop this quality when programmed appropriately.
Stretch-shortening cycle
During a countermovement jump, muscles and tendons rapidly lengthen before the upward movement. This sequence can store and release elastic energy while the nervous system coordinates changes in direction.
Plyometric exercises train this rapid transition. The drills can range from lower-intensity hops to demanding depth jumps, so exercise selection should match the athlete’s experience and current workload.
Jumping technique
Arm swing, countermovement depth, takeoff position, and approach timing can influence a jump test.
A biomechanics study on countermovement and arm swing found that both contributed to jump performance, with arm swing producing the larger effect in that experiment. This supports practicing the same jumping style used in your sport or test.
It does not mean that one technique adjustment will add a guaranteed number of inches.
Body mass and composition
Jumping requires accelerating your body upward. Extra mass that does not contribute to force production can make this more difficult, but becoming lighter is not always beneficial.
Athletes need enough energy to train, recover, and preserve muscle. Anyone pursuing fat loss should use a gradual approach instead of assuming that rapid weight loss will improve performance.
Coordination and skill
Running jumps depend on converting horizontal speed into vertical movement. Foot placement, the penultimate step, arm action, and takeoff timing all matter.
An athlete may become a better jumper by coordinating existing strength more effectively. Skill work is especially relevant when standing-jump progress does not transfer to a basketball or volleyball approach.
Training Methods That Can Improve Your Vertical
No single training method is best for every athlete. The useful choice depends on what currently limits performance.
Strength training
Exercises such as squats, trap-bar deadlifts, Romanian deadlifts, split squats, and hip thrusts can develop lower-body strength. The exact exercise is less important than good technique, sensible progression, and a plan that fits the athlete.
Strength training may be particularly useful for someone who is relatively weak for their body mass. Beginners should learn resistance exercises with manageable loads and qualified instruction when needed.
Adding weight quickly is not the goal. The purpose is to build force-producing capacity without allowing fatigue or poor technique to take over.
Plyometric training
Plyometrics include movements such as pogo hops, squat jumps, bounds, box jumps, and depth jumps. These exercises differ considerably in intensity.
Lower-intensity drills can help develop landing control and basic elastic qualities. More demanding exercises create greater forces and are not automatically appropriate for beginners.
Quality is more important than accumulating the highest possible number of contacts. When jump height, landing control, or movement speed declines noticeably, continuing to add repetitions may only increase fatigue.
Research supports plyometric training as a means of improving vertical jumping, but results vary by age, training background, sport, exercise selection, volume, and program length.
Combined strength and plyometric training
Strength and plyometric exercises address related but different qualities. Combining them may be useful when the weekly workload is organized carefully.
A systematic review of strength, plyometric, and combined training reported improvements in several measures of athletic performance. The review also highlights why results should be interpreted within the age group, sport, and program being studied.
Combining methods does not mean stacking two complete programs on top of practices and games. Total lower-body stress still matters.
Technique practice
Film your jumps from the side and front when practical. Look for consistent setup, controlled countermovement, coordinated arm action, stable landings, and repeatable approach steps.
Change one detail at a time and use the same measurement method. That makes it easier to tell whether the adjustment actually helped.
Recovery Is Part of Jump Training
Maximum-effort jumping places stress on muscles, tendons, joints, and the nervous system. More training is not always better.
A useful program leaves enough recovery between demanding lower-body sessions. The required time depends on training age, sport practices, games, sleep, nutrition, and the athlete’s response.
Warning signs that the workload may need adjustment include:
- Declining jump height across several sessions
- Persistent soreness that does not improve
- Loss of landing control
- Unusual fatigue or reduced motivation
- Joint discomfort or sharp pain
Sharp or persistent pain is a reason to stop and seek appropriate professional guidance, not something to push through for the sake of completing a schedule.
How to Measure Vertical Jump Progress
Small changes are difficult to interpret when testing conditions keep changing. Use a repeatable process.
Establish separate baselines
Record standing and approach jumps separately. They involve different amounts of technique and momentum.
Keep the testing method consistent.
Use the same wall, jump device, shoes, warm-up, arm action, and approach. Test at a similar time of day when possible.
Use several attempts
Take multiple well-rested attempts and record the best valid result. Avoid comparing one tired jump with one unusually good jump.
Track more than jump height.
Useful training notes can include:
- Exercises and resistance used
- Sets, repetitions, and jump contacts
- Practice and competition schedule
- Sleep and general fatigue
- Soreness or discomfort
- Standing and approach jump results
Retesting every few weeks is usually more informative than testing maximum jump height every day. Daily testing can become another source of fatigue and may encourage you to react to normal variation.
Common Mistakes That Limit Progress
Testing instead of training
Repeated maximum dunk attempts feel productive, but they do not replace a balanced training plan. Constant testing can also add fatigue without addressing strength or technical weaknesses.
Using advanced plyometrics too soon
Depth jumps and high-volume bounding are demanding. Athletes should first demonstrate controlled landings and tolerate simpler drills.
Ignoring strength
Jumping drills may not solve a basic strength limitation. Relatively weak athletes may benefit from a period of progressive resistance training.
Ignoring speed and technique
The opposite problem also occurs. An athlete may become stronger without improving the ability to express force quickly or coordinate an approach jump.
Changing programs too often
Switching routines every few weeks makes it difficult to evaluate what is working. A reasonable program needs enough time to adapt and then consistent retesting.
Overlooking sport workload
Basketball and volleyball practices already include accelerations, landings, and jumps. Adding a separate program without counting that workload can interfere with recovery.
Comparing incompatible test results
A standing reach test and an approach jump measured on a different device should not be treated as direct before-and-after comparisons.
What Is a Realistic Vertical Jump Goal?
A useful goal is specific to your starting point and measurement method.
Instead of promising yourself a fixed number of inches, consider goals such as:
- Complete a training block without missing scheduled recovery.
- Improve squat or split-squat strength with consistent technique.
- Perform basic plyometrics with quieter, more controlled landings.
- Make approach steps repeatable.
- Reach a clearly marked target more consistently.
- Improve a standardized jump test across several testing sessions.
Progress often slows as athletes become better trained. A small, repeatable improvement can still have practical value on the court.
Choosing a Structured Vertical Jump Program
A structured program can reduce guesswork by organizing exercises, progression, and recovery. Programs still differ in their methods and equipment requirements.
Vert Shock emphasizes an eight-week, equipment-light schedule centered on jumping and plyometric work. Jump Manual uses a broader approach that includes strength training, technique, and education.
Our complete Vert Shock vs Jump Manual comparison explains those differences and who each program may suit.
You can also read the individual Vert Shock review and Jump Manual review before deciding whether either program fits your experience and equipment.
No commercial program can guarantee that every athlete will gain a particular number of inches. Evaluate the training approach, time requirements, exercise difficulty, support, price, and refund terms before purchasing.
Frequently Asked Questions
How much can the average person increase their vertical jump?
There is no reliable number that applies to everyone. Studies report group averages across different ages, sports, jump tests, and training methods. Less-trained participants may have more room to improve, while experienced athletes may progress more slowly.
How long does it take to improve your vertical jump?
Training studies commonly use blocks lasting several weeks or months. The necessary time depends on the athlete and the quality being trained. Strength, explosive power, technique, and tolerance for plyometric work do not always improve at the same rate.
Do squats increase vertical jump height?
Squats can help develop lower-body strength, and research has shown that resistance training improves jump performance. However, squats do not guarantee a specific increase. Exercise technique, programming, power development, jumping skill, and recovery also matter.
What is the fastest way to increase vertical jump height?
There is no universal shortcut. A useful program identifies the athlete’s main limitation and combines appropriate strength, plyometric, and technical work while managing fatigue. Someone with inefficient mechanics may benefit from technique practice, while someone with limited relative strength may need more resistance training.
Can adults improve their vertical jump?
Adults can improve strength, power, and jumping skill. The appropriate starting point and recovery schedule depend on experience, health, current activity, and injury history.
Can losing weight improve vertical jump height?
Reducing excess body fat while preserving strength may improve power relative to body mass. The effect is unpredictable, and losing muscle mass or training energy can reduce performance. Weight loss should not be treated as a guaranteed vertical-jump strategy.
What is considered a good vertical jump?
A good result depends on the test, age group, sex, sport, position, and training background. Standing and approach jumps should be evaluated separately. The most useful comparison is often your own result measured repeatedly under the same conditions.
Key Takeaways
Adding 20 measured inches to a vertical jump in a single short program is not a realistic expectation for most people.
Research supports strength training, plyometrics, and combined approaches as ways to improve jump performance. It does not support guaranteeing an exact result for an individual.
The most productive approach is to establish a consistent baseline, identify likely limitations, follow an appropriate program, manage recovery, and retest under the same conditions.
A few genuine inches of improvement may sound modest beside a viral transformation claim, but they can make a meaningful difference in athletic performance.