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The aim of this study was to investigate the relationship between direct method and indirect method (Yo-Yo Intermittent Recovery Test Level II) that are used to determine aerobic capacity and endurance. Fourteen basketball players (22.49 ±04.82 year-old with the height 192.36±5.90 cm, weight 89.21±7.6 kg, Body fat percentage 11.07 ± 1.82 %) voluntarily participated in this study. Yo-Yo Intermittent Recovery Test Level II protocol (YIRT 2) was implemented to participants. Distance covered by the athletes, estimated VO 2max , direct VO 2max , Anaerobic threshold VO 2 and Anaerobic threshold heart rate (HR AT ) values were recorded. Direct VO 2max and other respiratory parameters were measured with telemetric gas analyzer. After 5 minute rest in supine position heart rates (HR rest ), rest lactate levels (LA rest ) and maximal heart rate (HR max ) during the test and post test lactate levels (LA post ) were measured. Pearson Correlation Test was used to determine the relationship between the variables. P value was set at 0,05. According to the findings, positively significant large correlation was found between estimated VO 2max and direct VO 2max (r = 0.504, p < 0.05), HR max (r = 0.501, p < 0.05), positively significant large correlation was found between distance and Direct VO 2max (r = 0.521, p < 0.05), HR max (r = 0.516, p < 0.05). There is no significant relationship except above-mentioned variables (p<0.05). YIRT2 can guess VO 2max of professional male basketball players and can be used to evaluate endurance.

The Yo-Yo IR2 test in professional basketball players