By SwimSwam Partner Content on SwimSwam
Every swim coach has seen it: a stroke that looks good on video, yet somehow the swimmer still isn’t moving as fast as they should.
Swimming technique is full of subtle inefficiencies that are difficult to detect with the naked eye. A swimmer may be applying force downward instead of backward, losing propulsion (and therefore speed) mid-stroke, or producing different levels of power from each arm. Individually, these issues might seem minor. Over the course of a race, they compound into meaningful performance losses.
For decades, video analysis has helped coaches evaluate technique, but even the best footage struggles to reveal how a swimmer is actually applying force to the water.
That’s where new tools like eo SwimBETTER are introducing a new and very different layer of insight.
Worn on the hands, eo SwimBETTER measures force, power, propulsion and hand path throughout each stroke. Within seconds of finishing a set, swimmers and coaches can review visual charts showing exactly how force is being applied in multiple directions.
Those charts often reveal clear technical patterns – from propulsive imbalance between hands to excessive lateral force or interruptions in mid-stroke propulsion.
To help coaches interpret these signals, eo has developed a Technical Error Index outlining 12 common freestyle errors that can be identified directly in eo SwimBETTER data, along with the charts where those patterns typically appear.
The guide is designed to help coaches quickly identify the dominant issue, prioritise corrections and confirm improvements using post-intervention data.
Download the Technical Error Index here.
eo also hosts regular Talking Data sessions, where coaches and athletes review real examples of eo SwimBETTER data and discuss how to interpret patterns.
Register for the next Talking Data session here.
Watch the documentary Swimming’s Moneyball:
EO SwimBETTER is a SwimSwam Partner.
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