[Formula: see text] kinetics and tethered strength influence the 200-m front crawl stroke kinematics and speed in young male swimmers

Background: The aim of this research was to examine the relationship between the fast component of oxygen consumption developed in 1-min [Formula: see text] and force indices both measured in tethered swimming test and to assess the influence of the gathered indices on speed and swimming kinematics in 200-m front crawl race. Methods: Forty-eight male swimmers (aged 13.5 ± 0.9 years old) participated in this study. Testing included 1) 1-min all-out front crawl tethered swimming while oxygen consumption (breath by breath) and tethered forces were measured, 2) 200-m front crawl race-like swimming featuring kinematic analysis, and 3) biological age (BA) examination. Results: During the 1-min all-out tethered swimming test, a linear increase in oxygen consumption was observed. There were moderate to high partial correlations between particular periods of seconds in the 1-min [Formula: see text] : 31–60, 41–60, and 51–60 and F (max), F ( ave ), and I ( ave ) of tethered swimming, while 41–60 and 51–60 [Formula: see text] were moderately to highly interrelated with all the swimming speed indices and SI. The swimming speed indices significantly interplayed with SL, SI, F (max), F ( ave ), and I ( ave ). Partial correlations were computed with BA control. Conclusion: The ability of reaching a high level of [Formula: see text] fast is essential for a swimmer’s energy production at short- and middle-distance events. Reaching a high level of [Formula: see text] significantly determines tethered strength and swimming kinematics. The level of [Formula: see text] influences the maintenance of a proper pulling force and the stroke technique of front crawl swimming in young male swimmers.