Shoulders & resilience
How Many Hours a Week Is Too Much?
Most swim parents ask whether their athlete is doing enough. Swimming — year-round, with morning doubles arriving in the early teens — is a sport where the other question matters just as much.
Almost nobody asks the other question.
The number
Researchers studying overuse injuries in young athletes found a rule of thumb you can carry without a spreadsheet.
Athletes training more hours per week than their age in years had higher odds of a serious overuse injury.
A thirteen-year-old training sixteen hours a week is asking a thirteen-year-old body to absorb more than it is built for. A sixteen-year-old at sixteen hours is nearer the line.
It is not a law. It is a flag.
Why it holds up
Overuse injuries are not bad luck. They are load arriving faster than tissue adapts.
The same body of work describes the highest-risk profile: one sport, year-round training beyond eight months, and little unstructured play. Specialisation tracks with the injuries — and with worse sleep and higher in-season fatigue.
Swimming reaches this line quietly: a thirteen-year-old in a senior group can be at sixteen pool hours before anyone counts dryland, meets, or the second practice. That does not automatically mean stop — it means the strength base, the sleep, and the calendar have to be managed deliberately, because the margin for sloppiness is gone.
What to count
Everything, not just club training.
Both practices on double days. Dryland. Meet weekends. Camps and clinics. Lessons. The extra session because a cut is close.
Families reliably undercount, because each item looks small alone.
What to do with this
Add up one honest week — this week, not a typical one.
Compare it with her age. Most serious swimmers are well over — which is precisely why the rest of this site exists: strength, shoulder care and sleep are how a body affords hours the rule of thumb warns about, and a conversation with her club about the optional pieces is always allowed.
Then check the other ratio: organised training versus free play. More than two to one is a second flag.
The framework worth keeping
Hours should not outrun years. When they do, something gives — usually the player, usually at the worst point in the season.
This article supports our deeper guide: Shoulders & resilience.
Ask about your athleteQuestions parents ask
Does this mean swimming is bad for my athlete?
No. The pool is where she gets better and where she wants to be. The finding is about total load and whether recovery keeps pace — and it does mean swim families have to manage the ledger actively, because year-round training reaches the line early and never backs off it.
She swims and plays another sport too. Does that make it worse?
The hours still count, but playing more than one sport is protective in the research, not harmful. The highest-risk profile is one sport, year-round, for more hours than the athlete's age.
What about summer league and playing in the pool for fun?
Unstructured play is the one thing the research treats kindly. When organised training runs more than twice the free-play time, that ratio is itself a flag.
Where this comes from
The claims above are not our opinion. Here is where they come from.