Most season-tracking tools compare meet times and rankings. That tells a national team coach who won, but not why. If you want to know whether a swimmer’s turns, breakouts, and stroke rate are actually improving, you need consistent measurement at the training facility itself — not just at competitions.

Female swimmer racing with AIM Systems analysis in use

This is where fixed camera data changes the conversation. Because AIM Systems is permanently installed at a training facility, every session produces the same metrics, captured the same way, with no stopwatch variance between coaches or camera angles that shift week to week. That consistency is what makes season-long progression tracking possible.

Why turn time and breakout distance need season-long data

A single fast turn in one practice doesn’t mean much. What matters is whether turn time is trending down across eight or twelve weeks of training, and whether that trend holds under fatigue late in a set. AIM Systems logs turn time on every lap — head-entry-to-push-off for freestyle and backstroke, hand-touch-to-push-off for breaststroke and butterfly — so a coach can pull up a swimmer’s turns from week one against week ten of the same season.

Breakout distance works the same way. The system marks exactly where the head surfaces after each underwater phase, lap by lap. A swimmer who breaks out a half-meter further out in November than in September is doing something differently underwater. Because the data comes from fixed cameras at every session, that comparison is objective — not a coach’s memory of “it looked better.”

Stroke rate progression, not just stroke rate

Stroke rate on its own is a snapshot. Stroke rate progression, tracked across a season alongside lap time and dropoff, tells you whether a swimmer is holding technique together as training load increases. AIM Systems marks every individual stroke on a continuous graph of stroke rate through the whole swim, so a coach can see exactly where rate breaks down — not just that it did.

This is also where the pull-out and transition phase deserves more attention than it usually gets. Research from Gonjo and Olstad (2021), using the AIM race analysis system, compared elite and sub-elite breaststrokers over a full 100m. Elite swimmers were faster mainly due to higher clean-swimming velocity and a notably quicker glide after the wall push-off — but the pull-out phase itself showed no measurable difference between groups. Their modeling even suggested that swimmers with nearly identical race times could both break 60 seconds if they consistently hit their own best pull-out and transition segments. That’s a season-tracking opportunity most programs miss entirely.

What this looks like across a season

In practice, a coach reviews the stitched video and spreadsheet after each timed set — ready in about 2 minutes for a 50m swim, about 4 minutes for 100m. Over a season, those spreadsheets stack into a real progression record: turn time, breakout distance, stroke count, dropoff, and stroke rate, all comparable swim to swim.

  • Compare a swimmer’s current turn time against their own personal best from earlier in the season.
  • Track breakout distance trends across every training block, not just meet performances.
  • Flag where stroke rate degrades under fatigue, using the same fixed camera setup every time.

None of this requires wearable sensors or markers on the swimmer — it’s markerless, camera-only tracking built into the training environment. If you want to see how this works at a facility like yours, get in touch with AIM Systems.

Frequently asked questions

How can coaches measure swim technique progress over a season?
By using a permanently installed camera system that records the same metrics—turn time, breakout distance, and stroke rate—at every training session for direct week-to-week comparison.

Does stroke rate alone show if a swimmer is improving?
No, stroke rate should be tracked alongside lap time and dropoff across a season to see whether technique holds up as training load increases.

Is the pull-out phase in breaststroke worth coaching attention?
Yes, research using the AIM race analysis system found no measurable difference between elite and sub-elite swimmers in the pull-out phase, suggesting it’s an under-coached area even for strong racers.

Sources

  • Gonjo, T., & Olstad, B.H. (2021). Differences between elite and sub-elite swimmers in a 100 m breaststroke: a new race analysis approach with time-series velocity data. Sports Biomechanics. https://doi.org/10.1080/14763141.2021.1954238