Most youth sports injuries are decided by a calendar, not by a moment.
By the time something hurts, the conditions were set months earlier — in a schedule nobody sat down and designed, that accumulated one reasonable-sounding commitment at a time. The club season. Then the school season. Then the tournament team, because everyone else is doing it. Then a skills camp over the break, because it seemed like a shame to lose momentum.
Nobody made a bad decision. The year just quietly filled up.
So here’s an audit. Walk through your athlete’s actual twelve months, and check it against what the research suggests.
The Three Numbers
Before the calendar itself, the numbers worth measuring against. These come primarily from research led by Neeru Jayanthi, who followed nearly 1,200 young athletes.
Hours per week should not exceed age in years. A 12-year-old shouldn’t exceed roughly 12 hours a week of organized sport. Athletes participating in more hours per week than their age in years had roughly double the odds of a serious overuse injury.
Organized sport to free play should stay under about 2:1. Athletes whose ratio of organized sport to free play exceeded 2:1 had notably higher odds of serious overuse injury. Unstructured play isn’t wasted time — it develops movement variety, and it’s protective.
Under 16 hours a week, total. And no more than eight months per year in a single sport, per athletic training guidance.
Add up your athlete’s current week. Include practices, games, private coaching, strength sessions, and travel-heavy tournament days. Most families are surprised.
Fall: The Season Stack
What typically happens: School season and club season overlap. Practices most days, games at weekends, sometimes two teams in the same sport running simultaneously.
What to check: Total weekly hours across all commitments. This is where the number quietly doubles, because each coach only sees their own portion.
The specific risk: No single coach has the complete picture. Somebody — usually a parent — has to hold the total.
What to do: Track the actual weekly hours for two weeks. If it’s over the age-in-years figure, something needs to come out, and it’s easier to make that decision in September than in November when something hurts.
Winter: The Indoor Transition
What typically happens: Sports move indoors, surfaces change, and in some sports the season doesn’t really change at all.
What to check: Whether anything actually changed. A hard indoor surface after a season on grass is a genuine shift in loading, and it’s a common trigger for heel pain, shin pain, and knee complaints.
What to do: Treat a surface change as a load change. Build back into full volume over a couple of weeks rather than switching straight across.
Spring: The Overlap Nobody Planned
What typically happens: The winter season runs long while the spring season starts early. For a few weeks, an athlete is doing both.
What to check: Those overlap weeks specifically. They’re often the highest-load weeks of the entire year, and they arrive without anyone deciding to increase anything.
What to do: Look ahead and identify the overlap now. Reduce something deliberately during those weeks — fewer sessions with one team, or a skipped tournament.
Summer: The Off-Season That Isn’t
What typically happens: Showcase tournaments, camps, travel teams, and “optional” sessions that everyone attends.
What to check: Whether your athlete has any genuine break at all.
The eight-month rule matters here. Athletic training guidance recommends against playing a single sport more than eight months per year. That leaves roughly four months of doing something else — which almost no committed young athlete currently gets.
What to do: Schedule the break like it’s a commitment, because it functions as one. Two to three consecutive months away from the primary sport is the recommendation, and it’s genuinely difficult to arrange in a culture where absence reads as lack of commitment.
The Missing Block: Rest and Something Else
This is the item most calendars simply don’t contain.
Why it matters beyond injury: Playing a single sport develops mastery in a narrow subset of movement skills. Playing other sports builds diverse movement skills that transfer back to the original sport. The multi-sport pathway isn’t a compromise — it’s associated with better long-term outcomes.
An honest note on the evidence: the picture is genuinely debated. Some studies find specialization itself an independent risk factor for overuse injury, while others suggest that once you adjust for training volume, volume is the main driver rather than specialization per se.
Either way the practical advice converges: watch the hours, and don’t do one thing all year.
The Two Things Missing From Almost Every Calendar
Strength training. Two sessions a week, appropriate to age and maturity, supervised. It’s the single most effective addition for injury reduction and long-term development, and it’s the first thing dropped when the schedule tightens.
Sleep. Adolescents need substantially more sleep than most get, and insufficient sleep is consistently linked to higher injury rates and slower recovery in young athletes. Early practices, late games, long travel, and homework combine to make this the most under-protected variable in youth sport.
If the calendar doesn’t leave room for eight to ten hours a night, the calendar is too full regardless of what the hours-per-week total says.
The Conversation Nobody Wants to Have
The genuine obstacle to any of this isn’t information. It’s the fear that stepping back means falling behind.
Two things worth holding onto. Recommendations from sports medicine researchers consistently suggest that the most intense competitive training belongs after the growth spurt, not during it. And the athletes who make it furthest are overwhelmingly the ones who stayed healthy and stayed interested — not the ones with the highest volume at 12.
Burnout is a real outcome, not a soft one. Loss of enjoyment, dreading practice, and wanting to quit a sport they used to love are worth taking as seriously as a physical symptom, and they’re worth raising with your athlete’s doctor if they persist.
Warning Signs Across the Year
Pain lasting more than two weeks. Pain that recurs every season at the same point. A drop in performance without explanation. Loss of enthusiasm. Frequent illness. Persistent fatigue. Changes in mood, appetite, or sleep.
Get medical assessment for pain that’s worsening, night pain, swelling, a joint giving way, any suspected fracture, or any suspected concussion — which requires immediate removal from play and clearance before return.
Build the Year, Don’t Inherit It
Most families never sit down and design the year. It assembles itself from individually reasonable decisions.
A single hour spent mapping it out, counting the hours, and deciding where the break goes prevents a substantial share of what walks into our clinic each season.
Get a Preseason Assessment
The best time to find a weak link is before the season stacks up, not after something hurts.
Houghton Physical Therapy offers a free discovery visit at no cost and no obligation. You’ll get an assessment of your athlete’s strength, movement, and any asymmetries, an honest read on their current load, and practical guidance on structuring the year around the sports they actually want to play.
