Smartwatches as tools for measuring biomechanical parameters in swimmers of different expertise levels

Abstract

Smartwatches offer promising potential for swimming biomechanics research due to their ease of use and ability to collect data in real time. However, data accuracy may depend on the swimmer`s expertise levels, highlighting the need for comparative studies. Thus, this study compares biomechanical parameters measured at different swimming speeds and distances, using two smartwatches and video analysis in both experienced and novice swimmers. Garmin Fenix 6 Pro and Polar Advantage M2 smartwatches were used to monitor inexperienced and experienced swimmers during 50 m and 200 m freestyle at low and maximal effort, and were compared with a gold standard measure (video analysis). The analyzed variables were total distance, average time, average pace, total strokes, and average strokes per 25 m at low and maximal efforts. Data were compared among smartwatches and video analysis using repeated measures ANOVA, and the partial eta squared was used to quantify the effect size. Our results demonstrated considerable variations among smartwatches and video analysis in both groups. Interestingly, the inexperienced swimmers’ measurements demonstrated inconsistencies in most variables assessed, regardless of the smartwatch used. Conversely, less variations were found in experienced swimmers , especially when parameters such as stroke rate and total distance were evaluated. In conclusion, the smartwatches Polar Advantage M2 and Gar-min Fenix 6 Pro can be useful tools, especially for experienced swimmers. However, due to the potential variability in technical patterns among swimmers with different levels of expertise, the use of smartwatches should be approached with caution, as highly experienced swimmers require accurate and reliable data to optimize their performance.