LED session prior incremental step test enhance VO 2max in running

This study aimed to investigate the effect of prior LED sessions on the responses of cardiorespiratory parameters during the running incremental step test. Twenty-six healthy, physically active, young men, aged between 20 and 30  years, took part in this study. Participants performed two incremental load tests after placebo (PLA) and light-emitting diode application (LED), and had their gas exchange, heart rate (HR), blood lactate, and rating of perceived exertion (RPE) monitored during all tests. The PLA and LED condition s were compared using the dependent Studentt test with significance set at 5%. TheT test showed higher maximum oxygen uptake (VO2max) (PLA  = 47.2 ± 5.7; LED = 48.0 ± 5.4 ml kg−1 min−1, trivial effect size), peak velocity (Vpeak) (PLA  = 13.4 ± 1.2; LED = 13.6 ± 1.2 km h−1, trivial effect size), and lower maximum HR (PLA  = 195.3 ± 3.4; LED = 193.3 ± 3.9 b min−1, moderate effect size) for LED compared to PLA conditions. Furthermore, submaximal values of HR and RPE were lower, and submaximal VO2 values were higher when LED sessions prior to the incremental step test were applied. A positive response of the previous LED application in the blood lactate disappearance was also demonstrated, especially 13 and 15  min after the test. It is concluded that LED sessions prior to exercise modify cardiorespiratory response by affecting running tolerance during the incremental step test, metabolite c...
Source: Lasers in Medical Science - Category: Laser Surgery Source Type: research