Young athletes

What works

Broad movement foundations beat early sport specialization. The Starretts warn that early specialization backfires, and that broad movement skills, play, better coaching, sleep and fueling are the foundation of durable young athletes (Kelly and Juliet Starrett); kids who build wide movement foundations early keep their athleticism for decades (The Ready State). Jeff Cavaliere adds that early specialization is often promoted by those who profit from year-round youth sport, and it does not reduce injury rates (Jeff Cavaliere). Gray Cook frames athleticism as beginning with fundamental movement skills and respect for the developmental process, not early specialization (Gray Cook).

Start supervised strength and conditioning well before age 18. The Starretts are emphatic: youth athletes with college ambitions should learn the movements and language of strength training before recruitment, not after (Kelly and Juliet Starrett, The Ready State), training 2 to 3 days per week for about 45 minutes under a qualified coach (Kelly and Juliet Starrett), and years of missed jumping and sprinting development cannot be crammed in at the end of high school (Kelly and Juliet Starrett). Dr. Jordan Shallow argues many adolescent training styles under-expose young athletes to stress and cap their potential (Dr. Jordan Shallow), and Dr. Pat Davidson calls avoiding heavy lifting in your 20s out of injury fear an unnecessary caution (Dr. Pat Davidson).

A quality youth session is only about half weightlifting. The Starretts' template: roughly 50% weight training and 50% athletic development, concretely 5 to 10 minutes of body preparation, 10 to 15 minutes of jumping and sprinting, then about 30 minutes of lifting, plus isometrics, shoulder health, mobility and games (Kelly and Juliet Starrett, session mix). Fundamentals should include sprinting, jumping, cutting, reacting and changing direction, with the gym building tissue capacity rather than replacing sport skill (The Ready State).

Technique before load. Mike Boyle's rule set for young athletes: how they lift matters more than how much, teach the basics and progress slowly, and if a young athlete strains to think through another rep, the weight is too heavy (Mike Boyle). This matches the Starretts' insistence on qualified supervision for youth new to strength work (Kelly and Juliet Starrett) and their point that skill mastery requires normalizing dozens to hundreds of failed attempts (The Ready State).

Fueling is a limiting factor, and parents usually underestimate it. Youth athletes training 15+ hours weekly while still growing typically need 2,800 to 4,000+ calories per day, far above the 1,600 to 2,000 of a non-athletic adult woman, and under-fueling happens when parents feed young athletes their own adult diet (Kelly and Juliet Starrett, under-fueling). Practical habits: about 1 litre of water on waking, a nutritious breakfast, and easily digestible snacks rather than heavy, fatty meals between games (Kelly and Juliet Starrett). Dr. Vonda Wright connects the risk directly to bone: low muscle mass, sedentary habits and relative energy deficiency with menstrual irregularity in young women impair bone development (Dr. Vonda Wright).

Play, outdoor time and less screen time are training inputs, not extras. Previous generations logged up to 15 times more rigorous play hours by age 14, and today's reduced physical literacy raises injury risk (Kelly and Juliet Starrett). Children need a minimum of 20 minutes of recess daily, ideally multiple breaks, never withheld as punishment (Kelly and Juliet Starrett). Excessive screen time is linked to stress, social disconnection and a youth mental health epidemic (The Ready State), a point Gray Cook echoes on limiting technology to rebuild patience (Gray Cook). Dr. Vonda Wright notes childhood is the critical window for building peak mitochondrial capacity, with past generations of children active 3 to 5 hours daily (Dr. Vonda Wright).

Parents are the operating system. Children learn health habits by watching their parents, not from lectures (Dr. Vonda Wright). The Starretts cast parents as high-performance directors: preparing meals and snacks, protecting sleep, managing logistics and preventing burnout in year-round youth sport (The Ready State), and normalizing conversations about pain and recovery (Kelly and Juliet Starrett).

For specific situations

• Youth aquatic athletes: maintain (or slightly reduce) swimming or water polo volume while adding 2 to 3 strength sessions weekly (Kelly and Juliet Starrett).
• Early adolescents in growth spurts: rapid physical change shifts injury risk and recovery needs, so training must adapt to the growing body rather than follow a fixed plan (The Ready State).
• Very young children and toddlers: volume of graded movement exposure comes before quality; repetition builds the neurological patterning that technique later refines (Dr. Jordan Shallow, graded exposure). Coordination deficits in children respond quickly, in roughly two weeks, to a proper movement diet of neurodevelopmental exercises (Gray Cook).
• Young women: screen for relative energy deficiency and menstrual irregularity, which quietly undermine bone development during the key accrual years (Dr. Vonda Wright).
• Multi-game tournament days: structure recovery between games with hydration, digestible food, stretching, rest and mental decompression (Kelly and Juliet Starrett).

Open questions

• How hard to push adolescents. Dr. Jordan Shallow holds that typical adolescent training under-exposes young athletes to stress and limits their genetic potential (Dr. Jordan Shallow), while Mike Boyle's default is conservative: basics, slow progression, and lighten the bar at the first sign of strain (Mike Boyle). The practical middle: challenge youth meaningfully, but let technique quality, not bravado, set the ceiling.

Cautions

• Steroids are categorically off the table for teens: they can close growth plates early and cap height, interfere with prefrontal cortex development with lifelong effects on impulse control, and cause sexual dysfunction; teens can make outstanding natural progress with smart training, good food and plenty of sleep (Dr. Mike Israetel).
• Pain talk needs framing, not dismissal: pain is common in youth sport and usually a request for change rather than a trauma signal, but it needs a plan (isometrics, sleep, nutrition, soft tissue work) and early attention so it never escalates (Kelly and Juliet Starrett, The Ready State).
• Source concentration: most of this topic's material comes from one expert household (the Starretts); their positions align with the wider consensus, but several specifics (session split, calorie ranges) rest on their authority alone.

Putting it into practice

• Youth sessions: about 50% lifting, 50% athletic development; template 5 to 10 minutes body prep, 10 to 15 minutes jumping and sprinting, roughly 30 minutes strength work, 2 to 3 sessions weekly of about 45 minutes.
• Include sprinting, jumping, cutting, reacting and change of direction in every youth program; never deliver lifting-only plans to under-18s.
• Enforce technique-first load selection for youth: any grinding, form-breaking rep triggers an automatic load reduction prompt.
• Flag early specialization: if a youth profile shows one sport year-round, surface multi-sport and free-play guidance.
• Fueling module for youth athletes: 2,800 to 4,000+ calorie needs at high training volumes, 1 litre of water on waking, digestible between-game snacks, and an under-fueling alert when high training hours pair with adult-sized portions; for young women, add menstrual irregularity as an energy deficiency red flag.
• Parent-facing content: role modelling, sleep protection, recovery check-ins, and a pain conversation script (pain = request for change, act early).
• Hard block plus educational messaging on any teen interest in anabolic steroids.
• Daily movement floor for children: at least 20 minutes of recess or free play, ideally more, plus outdoor time as a default recommendation.

Experts in this guide: Dr. Jordan Shallow, Dr. Mike Israetel, Dr. Pat Davidson, Dr. Vonda Wright, Gray Cook, Jeff Cavaliere, Kelly and Juliet Starrett, Mike Boyle, The Ready State, graded exposure, session mix, under-fueling.

Before you act. Entrain is a free knowledge resource. It brings together what named doctors, scientists and coaches teach publicly, with sources, so you can explore and discuss it with your own clinician. It does not diagnose, treat or prescribe, and it is not a substitute for medical care.