I’ve been working with young athletes at Kratos Performance & Fitness for years now, and I’ll be honest with you, the number one question I get from parents isn’t about training exercises or reps and sets. It’s this: “Is my kid ready? Am I starting too early? Am I starting too late?”
And I completely understand why. The youth sports landscape has changed dramatically. There’s more pressure, more competition, and more information, most of it contradictory, than ever before. Parents are trying to do right by their kids, and coaches are trying to build real athletes, not just players who are good for their age group right now.
In this guide I give you a straightforward, science-backed, no-nonsense answer to every major question around youth athlete development. Whether your child is 6 years old just discovering sport, or a 13-year-old already getting recruited talk thrown at them, this guide is for you.
My name is David Schwartz, CSCS. I’m the Co-Founder of Kratos Performance & Fitness in Lincoln, Nebraska. Every single week I work directly with youth athletes from 2nd grade through 8th grade, and I see firsthand what works, and what quietly destroys a young athlete’s potential before they ever reach high school.
Let’s get into it.
| What You’ll Learn in This Guide • What age kids should start structured athletic training • The 3 developmental stages every parent and coach must understand • Why early sport specialization is quietly ruining youth athletes • The 7 signs your child is ready to level up their training • How to choose the right youth athletic training program • What group training vs. private training actually means for young athletes • How to build speed and coordination at different age groups • Nutrition basics for youth athletes • And how everything connects to long-term athletic success |
What Is Youth Athlete Development, and Why Most People Get It Wrong
Youth athlete development isn’t just little kids doing adult workouts scaled down. That’s the first and biggest mistake I see. True youth athletic development is a long-term, age-appropriate process that builds the physical, psychological, and movement foundation your child will rely on for the rest of their athletic career, and honestly, the rest of their life.
The research on this is clear. The Long-Term Athlete Development (LTAD) model, developed by sport scientists and adopted by major sporting organizations worldwide, shows that the path to elite performance isn’t paved with early, intense specialization. It’s built on broad, progressive, developmentally appropriate training that respects where a child is physically and mentally at each stage.
When we skip those stages, we see the consequences every week in our facility. Kids who were pushed too hard, too early, show up at 14 or 15 with overuse injuries, burnout, or movement patterns that are so deeply engrained in the wrong way that we spend months just undoing the damage before we can start building them up.
The good news? When development is done right, the ceiling for your child’s potential is dramatically higher.
The 3 Developmental Stages Every Parent and Coach Must Understand
At Kratos, everything we do with youth athletes is organized around developmental stages, not just age, not just sport, and definitely not just size. Here’s how we think about it:
Stage 1: Fundamental Movement Phase (Ages 6–9 / Grades 2nd–4th)
This is the “play and learn” stage. The primary goal here isn’t sport performance, it’s building a movement vocabulary. Kids at this age are in a critical window for developing coordination, balance, agility, and basic motor patterns. If they miss this window, they spend years trying to catch up.
At Kratos, our Youth Development Program (2nd–4th grade) is built entirely around this concept. We’re not trying to build little powerlifters. We’re teaching kids to move well, move confidently, and have fun doing it. That foundation is everything.
Stage 2: Athletic Development Phase (Ages 10–13 / Grades 5th–8th)
This is where things start to get exciting — and where a lot of parents start making critical mistakes. The 5th through 7th grade window in particular is a massive opportunity. Kids in this range are neurologically primed to develop speed, power, and strength. Their bodies can adapt faster to training stimulus than at almost any other time in their lives.
This is the phase where introducing structured strength training, speed work, and sport-specific movement patterns pays enormous dividends. Done correctly, training in this window doesn’t stunt growth — it accelerates it.
Our Youth Sports Performance Program (5th–7th grade) and High School Preparation Program (8th grade) exist precisely because we know how important this window is. Miss it, and your child enters high school a step behind. Train through it properly, and they walk into their freshman year already ahead of the competition.
Stage 3: Performance Consolidation (Ages 14–18 / High School)
By high school, the foundation should be built. Now we’re building on it, refining sport-specific skills, maximizing strength and power output, and developing the mental and tactical edge that separates good athletes from great ones. This is also the stage where recruiting conversations start happening, which raises the stakes considerably.
The Truth About Early Sport Specialization (And Why It’s Quietly Hurting Your Kid)
I want to spend some real time on this because it’s the single biggest issue I see in youth sports today. Early sport specialization — having a child focus exclusively on one sport, year-round, before age 14 — is being sold to parents as the path to elite performance. It’s not.
Here’s what the research actually says:
- Higher injury rates. Kids who specialize early suffer significantly more overuse injuries. A 2019 study in the Orthopaedic Journal of Sports Medicine found that early specializers were 1.5x more likely to report a serious overuse injury.
- Higher burnout rates. Athletes who specialize before age 14 drop out of sport entirely at far higher rates than multi-sport athletes.
- No long-term performance advantage. Studies of elite athletes across multiple sports — including the NFL, MLB, and Olympic sports — consistently show that the majority were multi-sport athletes through at least age 14.
- Reduced athletic toolkit. When kids only train the movement patterns of one sport, they develop gaps in their athleticism that eventually limit their ceiling.
I’ve seen this pattern play out so many times. A kid is a standout soccer player at age 10, so the family goes all-in on soccer — year-round leagues, skill academies, no off-season. By 15, the kid has a chronic hip flexor issue, hasn’t developed lateral quickness, and is getting passed by kids who played three sports and only started specializing in 8th grade.
Is Strength Training Safe for Youth Athletes? (The Question Every Parent Asks)
Let me answer this directly because I know it’s on every parent’s mind: Yes. Strength training is not only safe for youth athletes — when supervised and age-appropriate, it is one of the most beneficial investments you can make in your child’s physical development.
The key words in all of that are “supervised” and “age-appropriate.” A 9-year-old doing a max-effort back squat with bad form? That’s a problem. A 9-year-old learning proper squat mechanics with bodyweight, building movement patterns that will serve them for decades? That’s some of the best athletic development work you can do.
At Kratos, every program — from our youngest Junior Stars athletes to our high school performance athletes — is coached by CSCS-certified (Certified Strength & Conditioning Specialist) coaches. The CSCS is the premier certification in the field, administered by the NSCA, and requires a bachelor’s degree plus a rigorous examination. You should ask that question of any facility you’re considering: Who is coaching my child, and what are their credentials?
The 7 Signs Your Young Athlete Is Ready to Level Up Their Training
Parents ask me all the time: “How do I know when my kid is ready for more structured, serious training?” Here are the seven signs I look for:
- 1. They’re asking for more. When a kid is voluntarily asking to train more, asking questions about how to get better, watching training content on their own — that intrinsic motivation is the clearest signal.
- 2. They’re competitive beyond just winning. Athletes who are ready to level up care about competing with themselves, not just the scoreboard. They notice when they ran a route slower than last week.
- 3. They can follow instructions consistently. Structured training requires coachability. If your child can follow multi-step directions in a practice environment, they’re ready for a training environment.
- 4. They have a basic movement foundation. They can run without tripping over themselves, jump and land with some control, and do basic bodyweight movements.
- 5. They’re emotionally regulated enough to handle frustration. Training is hard. There will be days where nothing clicks. If your child can manage frustration without shutting down, they’ll benefit enormously from coaching.
- 6. They’re sleeping and eating reasonably well. Recovery and nutrition are the other side of the training coin. A kid who is chronically sleep-deprived or eating nothing but processed food won’t respond to training the same way.
- 7. They’ve expressed genuine interest in at least two different sports or physical activities. This is my benchmark for avoiding the early specialization trap. Kids with a broad movement interest develop faster.
What to Actually Look for in a Youth Athletic Training Program
Not all youth training programs are created equal. In fact, some of them are actively harmful. Here’s my checklist — as someone who works in this field every day — of what a quality youth athletic development program actually looks like.
Credentialed Coaches
This is non-negotiable. Anyone working with youth athletes in a structured training environment should have legitimate credentials. At minimum, look for coaches with CSCS (Certified Strength & Conditioning Specialist) or NASM/ACSM certifications. Ask what continuing education they complete. At Kratos, every head coach holds a CSCS certification, and our coaches hold additional specializations in DNS, TPI, and other advanced methodologies.
Age-Appropriate Programming
A good program isn’t just a scaled-down adult program. It’s built from the ground up with that age group’s developmental needs in mind. Ask: what does the program look like for a 9-year-old vs. a 13-year-old? The answer should be very different.
Emphasis on Movement Quality Before Intensity
The best youth programs prioritize movement quality — proper mechanics, coordination, and control — before adding intensity or load. If a facility has 10-year-olds doing heavy barbell work before they’ve mastered bodyweight movement, walk out.
Small Group Sizes
Youth athletes need coaching, not supervision. In a group of 20 kids, no coach can provide the individual attention needed to correct mechanics and keep athletes safe. Look for programs with manageable group sizes and high coach-to-athlete ratios.
A Positive, Athlete-Centered Environment
Young athletes develop better in environments where they feel psychologically safe — where mistakes are part of learning, not cause for embarrassment. This isn’t about being soft. It’s about creating the conditions where athletes can take the risks necessary to improve.
Group Training vs. Private Training for Youth Athletes: Which Is Better?
This is a question we get constantly, so let me break it down honestly.
Group training is excellent for youth athletes, especially in the foundational and early athletic development phases. Training alongside peers creates healthy competition, builds social skills, improves motivation, and — critically — develops the ability to perform under the social pressure that exists in every real sporting environment. Our group programs at Kratos are structured, coached, and purposeful. They are not babysitting with barbells.
Private or semi-private training becomes increasingly valuable as athletes advance. When a high school athlete has specific position demands to meet, a recruiting timeline to hit, or mechanical issues that need dedicated attention, individualized programming delivers results that group settings can’t replicate. Our private and semi-private training programs exist for exactly this reason.
My honest recommendation for most youth athletes (under 13): start in a quality group training program. The social development, exposure to coaching, and foundational movement work in a group setting is nearly always the right starting point. Private training can complement it — but it rarely needs to replace it at early stages.
Building Speed and Coordination at Different Ages: What Actually Works
Speed is trainable. That’s not a marketing claim — it’s a physiological fact. And the youth years are among the most responsive windows for speed development, particularly ages 10–13 when the nervous system is highly adaptable.
But speed training for a 7-year-old looks completely different than speed training for a 13-year-old. Here’s a breakdown:
Ages 6–9: Movement Exploration
At this stage, “speed training” is really coordination training disguised as fun. Tag games, relay races, directional changes, skipping variations, and hopping patterns are all developing the neuromuscular patterns that speed is built on. Don’t overcomplicate it. The goal is broad physical literacy.
Ages 10–12: Sprint Mechanics and Acceleration
This is the first window where we can deliberately teach sprint mechanics — arm action, hip height, ground contact time, and acceleration posture. Kids in this range can understand and apply coaching cues, and the neurological adaptations to speed training are exceptionally fast. Short sprint work, A-skip and B-skip drills, and change-of-direction training are all highly effective here.
Ages 13+: Power Development and Sport-Specific Speed
Speed in a 14-year-old athlete is now about force production. Plyometrics, loaded speed work, and strength training that directly translates to sprint speed (hip hinge patterns, single-leg work, core stability) become central tools. Sport-specific direction changes and reactive speed work match what they’ll face in competition.
Nutrition Basics for Youth Athletes: Fueling Development Without Overthinking It
I’ll keep this section focused on the basics because youth nutrition doesn’t need to be complicated — but it does need to be intentional.
Young athletes have higher energy and nutrient demands than sedentary kids, and significantly higher demands than what most parents realize. Under-fueling is one of the most common performance limiters I see in young athletes — not from lack of effort, but from lack of awareness.
| Youth Athlete Nutrition: The Non-Negotiables Protein: Young athletes need adequate protein to support muscle development and recovery. A general guideline: 0.7–1.0 grams of protein per pound of bodyweight for active youth athletes. Carbohydrates: This is the primary fuel source for training and competition. Don’t eliminate carbs — choose quality sources: whole grains, fruit, vegetables, rice. Hydration: Most young athletes are dehydrated before they even start training. Encourage consistent water intake throughout the day, not just during sessions. Meal Timing: A balanced meal 2–3 hours before training and a protein + carb combination within 30–60 minutes after training makes a measurable difference in recovery and adaptation. Avoid: excessive energy drinks, large amounts of processed sugar, and skipping meals before training. |
For parents who want to go deeper on this, our Nutrition Services at Kratos offer personalized plans designed specifically for youth and high school athletes — built around the demands of their specific sport, training load, and developmental stage.
What Parents Get Wrong (Honest Advice from Someone in the Facility Every Day)
I want to close this section of the guide with something that might sting a little, because I think it’s important and nobody else will say it directly:
The biggest obstacle to your child’s athletic development is often well-intentioned pressure from the sideline.
I’ve seen parents push kids through burnout because they didn’t want to “waste the investment.” I’ve seen athletes hesitate to take risks in training because they’re worried about how mom or dad will react. I’ve seen talented kids quit sport entirely — not because of the sport, but because the pressure around it became unbearable.
Your child’s athletic journey is theirs. Your job as a parent is to create the conditions for them to pursue it — transportation, financial investment, healthy meals, enough sleep, and emotional safety. It is not to coach them from the bleachers, compare them to other kids, or project your ambitions onto their journey.
The athletes I see develop the fastest are the ones whose parents cheer loudly and coach never. That’s the recipe.
How the Kratos Youth Development System Works: From 2nd Grade to High School
I want to walk you through exactly how we structure youth athletic development at Kratos, because I think it helps illustrate what a long-term, systematic approach actually looks like in practice.
Junior Stars Program (2nd–4th Grade)
Directed by Brady Bolles, CSCS, our Junior Stars program is built around fundamental movement development. Kids learn to run, jump, throw, and land correctly. They develop coordination, spatial awareness, and the basic movement patterns that every athletic skill is built on. The environment is high-energy, positive, and — most importantly — built for fun.
Youth Sports Performance Program (5th–7th Grade)
This is where we start building real athletic qualities — speed, strength, power, and agility — on top of that movement foundation. Athletes in this program are introduced to structured training methodologies, sprint mechanics, and age-appropriate resistance training. This is the program that makes the difference between kids who plateau in high school and kids who break through.
High School Preparation Program (8th Grade)
Our 8th grade program is specifically designed as a bridge between youth training and high school performance training. We introduce more advanced training concepts, increase training volume and intensity in a managed way, and begin addressing the sport-specific movement demands your athlete will face in high school competition. Athletes who complete this program step into 9th grade with a significant physical and mental edge.
| Ready to Get Started? Kratos Performance & Fitness | 1220 Aries Drive, Lincoln, NE 68521 Phone: (531) 500-3386 | Email: dschwartz@kratospf.com Open 7 days a week, 5am–10pm 👉 Try a FREE session for Youth Athletic Performance Training |
Final Thoughts
I’ve been working with young athletes long enough to see the full arc — the kids who come through our Junior Stars program in 2nd grade and end up as high school varsity starters, or the athletes who came to us in 8th grade behind the curve and graduated having earned college scholarship offers. The common thread in every success story isn’t talent. It’s a systematic, age-appropriate, long-term investment in development.
The game will take care of itself if you build the athlete first. That’s what youth athletic development is really about. If you have questions about any of our youth programs, or if you’d like to schedule a free introductory session for your young athlete, I’d love to talk. Reach out to us at Kratos — we’re in the facility 7 days a week and we’re always happy to have the conversation.
Frequently Asked Questions: Youth Athletic Development
At what age should my child start structured athletic training?
Most kids are ready for structured, supervised athletic training by age 6–7. At this stage, the focus should be entirely on movement fundamentals — coordination, balance, basic motor patterns — rather than sport performance. Structured strength training with external resistance is appropriate from approximately age 8–9, provided it is supervised by qualified coaches and focused on movement quality.
Will strength training stunt my child’s growth?
No. This is one of the most persistent myths in youth sports, and it is not supported by the research. The American Academy of Pediatrics has specifically addressed this: properly supervised strength training does not damage growth plates and actually promotes healthy bone development. Growth plate injuries from supervised youth strength training are exceedingly rare and almost always associated with improper technique or unsupervised training.
My child plays one sport year-round. Is that a problem?
Potentially, yes. The research is consistent that early sport specialization (before age 14) is associated with higher injury rates, higher burnout rates, and no long-term performance advantage over multi-sport athletes. If your child is under 14 and playing one sport exclusively, we’d encourage introducing at least one other physical activity or sport, and ensuring they have a true off-season each year.
How many days per week should my youth athlete train?
For kids under 10, 2–3 days of structured training per week is plenty — with a heavy emphasis on general play and movement exploration outside of structured sessions. For athletes ages 10–13, 3–4 structured sessions per week is appropriate. High school athletes can handle 4–5 structured training sessions per week, provided recovery, sleep, and nutrition are managed properly.
What’s the difference between your programs and the youth sports programs at a regular gym?
The primary difference is specificity, credentials, and intent. Our programs are designed exclusively for youth athlete development by CSCS-certified coaches who specialize in this population. Every program design decision is based on current sport science research and adapted to the specific developmental stage of the athlete. We are not a general fitness facility that happens to offer youth classes — youth athletic development is the core of what we do.