A balanced arm drive in breaststroke is crucial as outlined in this study which shows how unequal force between arms can hamper stroke efficiency. The research references eo SwimBETTER to demonstrate how advanced wearable sensors quantify force symmetry – even in short trials – providing data swimmers and coaches can use to optimise technique. By monitoring metrics such as hand path, force and consistency, eo SwimBETTER offers actionable insights into stroke mechanics and performance improvement.