Quick answer
A swimming plateau is when times stop dropping even though the kid is still showing up. It is normal: a large study of age group swimmers found yearly improvement of close to 10% at ages 8 to 10, about 5% at 11 to 14, and only 1 to 2% at 15 to 18. Weeks or even a season of flat times is usually development, not laziness. Judge the same event, in the same pool type, across months, not one noisy Saturday.
For about four months last year, Rafa's 100 Free sat at the exact same time. Not a hundredth faster. I was checking her results after every single meet, refreshing pages, comparing splits, getting frustrated for her, honestly more frustrated than she was. Michelle finally told me, "You need to stop looking at the numbers every week. You're going to drive yourself crazy before she does."
She was right. And if you are the parent who quietly checks times on the drive home, this is the article I wish I had read during those months.
Early on, the personal bests came almost every meet. Then, almost without warning, the times stopped falling. Weeks pass, then months. Your swimmer is training harder than ever, and a quiet question starts circling: is something wrong?
The answer, almost always, is no.
Why Plateaus Happen
Swimming improvement follows a predictable curve, and the data confirms it. A 2020 study in Frontiers in Sports and Active Living (Alshdokhi, Petersen and Clarke), analyzing 9,956 swimming years of backstroke results from 2006 to 2017, found that improving close to 10% a year is not unusual at ages 8 to 10, about 5% a year is realistic at 11 to 14, and only 1–2% a year should be expected from 15 to 18. That is one stroke, not a law for every event, but the shape of the curve is what parents feel in freestyle too.
| Age | Typical yearly improvement (backstroke study) |
|---|---|
| 8–10 | Close to 10% |
| 11–14 | About 5% |
| 15–18 | 1–2% |
In the younger years, kids experience rapid gains. Their bodies are growing, their technique is sharpening, and dropping multiple seconds in a season is common. It feels like progress will never slow down.
But it does. Once a swimmer reaches a certain level of physical and technical maturity, improvements shrink dramatically. Instead of two or three seconds per season, the gains become fractions: one percent here, half a percent there. For older age-group swimmers and high schoolers, improving by one to two percent per year is actually excellent progress, even if it does not feel like it.
In the same study, the gains kept shrinking as swimmers approached their performance potential around 18. The exact timing varies a lot from one swimmer to another, especially around puberty. Either way, the slowdown is a natural part of athletic development, not a sign that your child has peaked.
Plateaus Can Last Longer Than You Expect
Some plateaus last weeks. Others last months. A few last more than a year. It can be painful to watch, especially when your swimmer is putting in maximum effort and seeing no reward on the scoreboard. But consider this: during a plateau, the body is often making adaptations that are invisible, building aerobic capacity, refining neuromuscular pathways, and developing the strength that will eventually make the next drop possible.
The plateau is not wasted time. It is preparation.
It Is Not a Sign of Failure
This is one of the most important things a parent can internalize. A plateau does not mean your child is not talented. It does not mean the coaching is wrong. It does not mean they should switch clubs, add more hours, or try a different sport. It means they are at the stage where improvement requires patience, consistency, and trust in the process.
Elite swimmers go through flat stretches too; the difference is that they expect them. USA Swimming's 2024 membership report shows that 66.9% of its year-round athlete members were retained from one year to the next, and that retention dips at 14 (66.2%) and at 17 (63.0%). The report does not say why swimmers leave, but those are also the years when times flatten out, which is exactly when knowing that plateaus are normal helps a family stay the course.
Show Your Swimmer the Chart, Not the Last Meet
A plateau feels worse from the inside. Last spring Rafa went weeks without a personal best and started wondering out loud whether she had peaked. One evening I pulled up her 100 Free on a chart: eighteen months of official times, every race plotted. The last few meets were flat, but the line over the whole period was still climbing (on the chart, a rising line means faster). She could not feel it because she was too close to it. Seeing it changed her face in about five seconds.
That is the most useful thing data does during a plateau. It is not pressure. It is proof that the work before the stall counted.
A few rules make the chart honest:
- One event, one pool type. Short course and long course times do not belong on the same line.
- Start from the first sanctioned meet. The longer the history, the easier it is to see that flat stretches have happened before and ended.
- Wait for a pattern before changing anything. One rough weekend is not a reason to switch squads, strokes, or training loads. Three or four meets in the same event, compared with the same point last season, is a pattern worth taking to the coach.
- Keep practice out of it. Race times show the result; the coach knows what is happening in training. Bring the chart to that conversation instead of a feeling.
To see that long line for your own swimmer, open Best Times in Gophin and select an event: the evolution chart shows every official time in that event and pool type. Free.
What Parents Can Do
Your role during a plateau is not to fix it. It is to help your swimmer get through it with their love of the sport intact.
Shift the focus from times to technique and effort. Ask your child what they worked on in practice, not what their times were. Celebrate the mornings they showed up when they did not feel like it. Recognize the effort it takes to keep going when results are invisible.
Celebrate non-time achievements. Did they lead a warmup? Help a younger teammate? Nail a new turn? Get a compliment from the coach? These milestones matter, and noticing them tells your swimmer that their value is not defined by a number on a scoreboard.
Talk to the coach. Coaches understand plateaus. They see them constantly. A good conversation with the coach can reassure you and may lead to small training adjustments, a new focus on technique, or a change in race strategy that eventually breaks through the stall.
Avoid comparisons. Every swimmer develops on their own timeline. The teammate who is dropping time right now may hit their own plateau next season. Comparing your child's trajectory to someone else's is almost never productive and often harmful.
Be honest about your own frustration. If the plateau is bothering you more than it is bothering your swimmer, that is worth examining. Sometimes the best thing a parent can do is step back and let the athlete own their journey.
The Breakthrough Will Come
Plateaus end. Sometimes they end gradually, with small drops spread over many meets. Sometimes they end explosively, with a massive best time that seems to come out of nowhere. Either way, the work put in during the flat period is what made it possible.
Your swimmer does not need you to fix the plateau. They need you to believe in them while they are in it. That belief, steady and patient, is the most powerful thing you can offer.
If a growth spurt is part of the story, our guide to growth spurts and swim performance explains why times can even go backward for a while. And if the flat stretch comes with dread and exhaustion, read the signs of swimmer burnout.
If you need a picture of the stall instead of a feeling, open Compare → Seasons in Gophin (free): same event, same pool type, this season next to last. Take that to the coach. Do not let one noisy Saturday rewrite the year.
Sources
- Alshdokhi, K., Petersen, C. & Clarke, J. (2020). Improvement and Variability of Adolescent Backstroke Swimming Performance by Age. Frontiers in Sports and Active Living, 2:46. 9,956 swimming years (2006–2017): close to 10% a year at ages 8–10, about 5% at 11–14, 1–2% at 15–18. doi.org/10.3389/fspor.2020.00046
- USA Swimming (2025). 2024 Membership Demographics Report, p. 13: athlete retention 66.9% overall; 66.2% at age 14, 63.0% at 17, 29.4% at 18. PDF
