LJP YOUTH PERFORMANCE SERIES — You can’t out-train a body you haven’t fed to adapt.
Watch enough training sessions and the pattern repeats itself. An athlete who looks sharp for the first forty minutes starts missing touches, taking bad angles, losing the last half-step in a sprint they’d have won an hour earlier. Everyone reaches for the same explanation — conditioning, effort, focus. Almost nobody asks what that athlete ate for lunch.
This gap barely exists at the professional level, and not because professional athletes have better genetics. In every professional environment I’ve worked in — MLS locker rooms included — the players who never had a fueling problem weren’t the most disciplined guys in the building. They were just never left to manage it alone. Someone was paid, full time, to make sure it never came down to guesswork. Youth sport almost never has that person. So the job quietly falls to a fourteen-year-old to regulate something most adults never learned to manage for themselves — usually with no more guidance than “eat healthy” and a vague sense that dessert is the enemy.
The instinct to tighten things up — less sugar, smaller portions, cleaner eating — comes from a good place, but it’s usually solving a problem this athlete doesn’t have. Training four to six hours a week while still growing takes considerably more fuel than sitting through a school day, and the shortfall doesn’t just stall performance — it pulls from systems nobody thinks to blame: bone development, hormone regulation, immune function. Sports scientists have a name for the extreme version, Relative Energy Deficiency in Sport, or RED-S. Most youth athletes never reach that extreme, but plenty are living a milder version of it every week, and the clearest sign is carbohydrate around training. Show up under-fueled there and the last twenty minutes of a session will always feel harder than they should, no matter how fit that athlete actually is. Protein gets more credit than it earns relative to total intake — an athlete who simply eats enough across the day beats one chasing a perfect post-workout shake while under-eating everywhere else.
This is why every athlete at LJ Performance leaves training with a protein shake and a banana, taken immediately after the session. The strict 30-minute ‘anabolic window’ has been walked back by more recent research — the real window is measured in hours. What the habit actually buys is certainty: recovery fueling happens every time, not just on the days it’s convenient.
Hydration is the easiest of the three to fix, and the one most often ignored. A large share of what gets labeled “out of shape” is dehydration in disguise — a smaller margin before cramping, fatigue, and bad decisions show up, closing in earlier than they should.
None of this shows up on a highlight reel the next day. A single good or bad meal changes almost nothing. What actually matters is the pattern across months — whether an athlete is banking the resources to absorb hard training, or quietly running a deficit that eventually surfaces as fatigue that won’t lift, an injury that won’t fully heal, or growth that stalls for no obvious reason.
Training creates the demand. Recovery is when the adaptation actually happens. Nutrition is what pays for both. Underfund it and the other two are just effort spent with no return.
There’s a piece of this that catches even attentive parents off guard: caloric needs shift, sometimes sharply, as a young athlete moves through growth spurts — rarely on a predictable schedule. An athlete who’s suddenly hungrier, more tired, or slower to bounce back usually isn’t under-training or overtraining. They’re growing, and their fueling hasn’t caught up yet.
This is exactly why we educate on nutrition alongside training load and growth stage instead of treating it as a separate conversation. A growth spurt can move caloric needs as much as a heavy training block does — and the two tend to land at the same time, which is precisely when fueling gets overlooked the most and matters the most.
The Fueling Rules We Don’t Bend
Fuel the output, not the mirror. We educate every athlete on eating for what their training and growth actually demand — never for how they look.
The shake and the banana are non-negotiable. Every athlete leaves training with both, taken immediately — removing the guesswork so recovery fueling happens automatically, every time.
Consistency beats restriction, always. Regular meals, protein spread through the day, real hydration — a boring daily habit outperforms any short-term “clean eating” push.
Nutrition isn’t a willpower problem, and it was never meant to be managed by guesswork. It’s a trainable input with a physiological basis, and it deserves the same structured approach we bring to technical development, strength, speed, or recovery — not a separate set of rules improvised on the fly.
This is the same standard I’ve held athletes to inside professional locker rooms — the only difference is your athlete doesn’t have to wait until they’re a pro to get it. A free trial session is where we find out if their fueling actually matches what we’re asking their body to do: no guessing, just a real look at how training, growth, and nutrition line up for your athlete specifically.
Luis Jeronimo, MS, CSCS | Founder, LJ PERFORMANCE
Luis Jeronimo is a High Performance Coach, consultant, and innovator who has operated at the highest levels of sport - from Olympic programs, to the private sector working with some of the most elite athletes in the world, to multiple MLS clubs. He is the architect behind the performance systems and winning cultures those organizations have run on.
Today, he runs LJ PERFORMANCE in Columbus, OH, with one mission: to demonstrate what true high performance in soccer looks like — by fusing elite-level performance, recovery, technical, tactical, and holistic methods drawn from his time at the highest levels of sport, building a unique standard the next generation of athletes will train by.
That same standard - the systems, monitoring, and coaching used with professional athletes - is what every athlete at LJ PERFORMANCE trains under.