Strength Training for Young Tennis Players: Safe, Effective, Evidence-Based

The longest-running myth in youth coaching is that strength training is bad for kids — that it stunts growth, that it damages growth plates, that it should wait until after puberty. The position statements of every major sports medicine organization say the opposite. Properly designed strength training is safe, effective, and developmentally beneficial for young athletes, including tennis players. The actual risks lie not in lifting but in the alternatives — uncontrolled play, poor movement competency, accumulating overuse injuries from sport-specific repetition without a structural base to absorb it. Here is what the evidence supports for young tennis players.

What the position statements actually say

The American Academy of Pediatrics, the National Strength and Conditioning Association, the American College of Sports Medicine, and the International Olympic Committee have all published guidance in the past decade explicitly recommending well-designed strength training for children and adolescents. The growth-plate concern that dominated coaching culture in the 1980s is not supported by the modern epidemiology. Properly supervised resistance training has injury rates per training hour that are lower than most team sports, including the unstructured play that often substitutes for it (Faigenbaum et al., 2009).

The “properly designed” qualifier carries weight. The injuries that do occur in youth strength training cluster heavily around poor supervision, untrained coaches, ego-driven loading, and adult-style programs applied without adaptation. The injuries that do not occur cluster around supervised, technique-first, progressive programs adapted to the child’s developmental stage. The distinction is the program, not the activity.

For tennis players specifically, the rationale is even stronger. Tennis is repetitive, unilateral, and overhead-dominant. Without structural balance work, young tennis players develop predictable asymmetries — dominant-side trunk rotation strength, posterior shoulder weakness, hip mobility deficits — that turn into the chronic injury patterns of adult competitive players. A strength program at twelve through sixteen is the cheapest insurance against thirty-year-old wrist, shoulder, and back problems.

The developmental windows that matter

Children adapt to strength training differently than adults. Pre-pubertal children show strength gains predominantly through neural adaptation — better motor recruitment, better coordination — rather than through muscle hypertrophy, which is hormonally limited before puberty. Adolescents show both adaptations as hormones rise. Late adolescents respond closer to the adult adaptation pattern, with significant hypertrophy on appropriate programming.

What this means for programming: the pre-pubertal child benefits from strength training but does not need heavy loads. The gains come from motor learning, technique acquisition, and coordination, all of which can be developed with bodyweight, light external loads, and movement variety. The adolescent benefits from progressive loading but should still spend significant time on movement quality before chasing strength numbers. The late adolescent can train closer to an adult model but with attention to growth-related vulnerabilities — Osgood-Schlatter at the knee, Sever’s at the heel, apophysitis at multiple sites.

The growth spurt deserves specific attention. During the period of rapid growth — typically eleven to thirteen for girls, thirteen to fifteen for boys — bones lengthen faster than tendons and muscles can lengthen. This period has elevated injury risk for any high-load activity, including tennis itself. Strength programming should not stop, but it should pause heavy loading, emphasize mobility and motor control, and accept that the body is going through a temporary destabilization that is biological, not coachable. Patience during the growth spurt is its own coaching skill.

What a tennis-relevant program looks like at each age

The contents of a strength program change as the player matures. At nine to eleven, the program is movement competency disguised as games. Bodyweight squats and lunges in varied directions, simple bear crawls and bounding patterns, light medicine ball throws, single-leg balance work. The volume is low, the duration is short — fifteen to twenty minutes, two or three times a week — and the emphasis is on quality of movement, not loading.

At twelve to fourteen, structured technique work enters. Light dumbbell training for the upper body, focused on shoulder care, scapular control, and forearm strength. Bodyweight progression toward more challenging movements — pushup variations, lunge variations, single-leg work. Some external load on lower body movements when technique is solid. Medicine ball throws become more varied and more intent. Two to three sessions per week, twenty to thirty minutes.

At fifteen to seventeen, progressive loading begins in earnest. The young athlete can handle barbell movements — squat variations, deadlift variations, overhead pressing — with attention to technique and progression. Loads start light and rise systematically over months, never in single jumps. Tennis-specific power work begins to include moderate plyometrics, rotational power exercises, and grip-strength work. Three sessions per week, thirty to forty-five minutes, becomes the typical adult pattern.

At eighteen and beyond, the player is essentially on an adult program with attention to whatever growth-stage residuals remain. The honest reality is that most growth-related vulnerabilities resolve by then, and the structural foundation laid in the previous six years now supports a serious training stimulus.

The tennis-specific priorities

Within a general strength program for a tennis player, certain areas deserve more time than others. The non-negotiables:

• Shoulder care. Rotator cuff, scapular control, posterior shoulder mobility. Young servers are loading their shoulders heavily; the structures need to keep up. This is the area where neglected youth strength work shows up most expensively in adulthood.
• Single-leg lower body strength. Tennis is essentially a single-leg sport — every cut, every push-off, every recovery step is on one foot. Bilateral squats and deadlifts are valuable, but single-leg variations are more directly transferrable.
• Trunk and rotational core work. The kinetic chain that produces racquet speed flows through the trunk. A strong, well-controlled trunk under rotation is essential and is also where adult tennis players develop chronic low back pain when youth programming neglected it.
• Forearm and grip. The wrist, forearm, and grip are the smallest joints in the chain and the most loaded. Conditioning here is preventive for the chronic wrist and elbow injuries that derail adult careers.
• Hip mobility. Tennis demands hip rotation, hip flexion, hip extension under load. Young players who develop hip mobility early move better as adults and protect their lumbar spines from rotation overload.

The deprioritized areas are largely the showy ones — heavy bench press for chest development, pure isolation work for biceps or triceps, max-out compound lifts. These have a place in a well-developed adult program but are not where the early gains for a tennis player come from.

The myths that still drive parents

“Strength training stunts growth” — false. The bone-stimulating effect of resistance training is, if anything, mildly favorable for bone health. The growth plate is more vulnerable to acute trauma than to controlled progressive load.

“My child should just play more sports for strength” — partly false. Multi-sport activity is genuinely valuable for movement development, but specifically loaded strength training adds something multi-sport play does not — the targeted loading of specific structures under controlled conditions. The two are complementary, not substitutes.

“It’s too early at twelve” — false. The evidence base for the safety and benefits of strength training at twelve is robust. The qualifier is supervision and program design, not age cutoff.

“My child is small for their age; strength training will make them bulky” — false on the mechanism. Hormonal status determines muscle hypertrophy potential; pre-pubertal children gain strength predominantly through neural adaptation without much hypertrophy. Bulkiness comes later, during adolescence, and is not produced by reasonable training volumes anyway.

What good supervision looks like

The non-negotiable factor in youth strength training safety is supervision quality. The supervisor needs to know movement mechanics, recognize fatigue, understand age-appropriate progression, and have the authority to stop a child from chasing weight before technique is solid. A certified strength and conditioning coach, a physiotherapist with athletic training experience, or a tennis coach with formal strength training certification all fit this profile. A parent who lifts at the gym is generally not enough.

The ratio matters too. One supervisor per six children is workable for general youth strength programs. One per three is better for tennis-specific work, because the movements are technical and the supervisor needs to coach. Group programs of fifteen or twenty children with one supervisor are not actually supervision; they are play with weights.

One thing to do on court tomorrow

If you coach junior tennis players or have one in the family, look at the strength program they are currently doing — and if the answer is “none,” that is the gap to fix this month. The starting program for a ten-year-old is twenty minutes twice a week of bodyweight movement quality. The starting program for a fifteen-year-old is thirty minutes twice a week with light external load and shoulder care priority. The bar is not professional. The bar is “structured and supervised.” Anything is better than nothing, and nothing is the most common condition.

About the author: Emre Köse is a tennis coach at Beykoz Tenis Kulübü in Istanbul. He holds a BSc in Coaching Education from Marmara University, Faculty of Sport Sciences.

Related in this series: When to Start Tennis · Early Specialization vs Sampling · Why Tennis Players Need Strength Training · Avoiding Burnout in Juniors

Selected reading:

• Faigenbaum, A. D., et al. (2009). Youth resistance training: Updated position statement paper from the National Strength and Conditioning Association. Journal of Strength and Conditioning Research, 23(Suppl 5), S60–S79.
• Lloyd, R. S., et al. (2014). Position statement on youth resistance training: The 2014 international consensus. British Journal of Sports Medicine, 48(7), 498–505.
• American Academy of Pediatrics, Council on Sports Medicine and Fitness. (2008). Strength training by children and adolescents. Pediatrics, 121(4), 835–840.
• Behringer, M., et al. (2010). Effects of resistance training in children and adolescents: A meta-analysis. Pediatrics, 126(5), e1199–e1210.