Abstract des Autors

The purpose of this study was to investigate the role of training and power output on muscle oxygen desaturation during and resaturation after an arm Wingate test (WAnT). Two groups of subjects were studied; the first group consisted of nine athletes participating in upper arm anaerobic sports and the second group of 11 university students. As a consequence, the group of athletes (HP) produced higher peak and mean power output (p<0.01) than the group of university students (LP). Muscle oxygenation status was evaluated by using near infrared spectroscopy at the triceps brachii. The HP group exhibited 17.6+/-8.0 percent less muscle oxygen desaturation than the LP group (p<0.05) but similar muscle total hemoglobin during exercise and faster (p<0.05) muscle oxygen resaturation during recovery (τ=12.4 +/-5.2 sec in HP vs. τ=24.2+/-11.0 sec in LP). These results indicate that the HP group exhibits less muscle desaturation during an arm WAnT and has a faster resaturation rate, probably attributed to differences in muscle mass, muscle fiber recruitment capability, and ATP production through anaerobic pathways. Verf.-Referat