The Effects of 15 or 30 s SIT in Normobaric Hypoxia on Aerobic, Anaerobic Performance and Critical Power

• Published in: International journal of environmental research and public health 2021-04, Vol.18 (8), p.3976
• Main Authors: Karabiyik, Hakan, Eser, Mustafa Can, Guler, Ozkan, Yasli, Burak Caglar, Ertetik, Goktug, Sisman, Aysegul, Koz, Mitat, Gabrys, Tomasz, Pilis, Karol, Karayigit, Raci
• Format: Article
• Language: English
• Subjects: Adaptation; Altitude; Anaerobic threshold; Angiogenesis; Athletes; Body composition; Exercise; Hypoxia; Interval training; Laboratories; Oxygen consumption; Physical fitness; Rest; Sea level
• ISSN: 1660-4601; 1661-7827; 1660-4601
• DOI: 10.3390/ijerph18083976

Sprint interval training (SIT) is a concept that has been shown to enhance aerobic-anaerobic training adaptations and induce larger effects in hypoxia. The purpose of this study was to examine the effects of 4 weeks of SIT with 15 or 30 s in hypoxia on aerobic, anaerobic performance and critical power (CP). A total of 32 male team players were divided into four groups: SIT with 15 s at FiO : 0.209 (15 N); FiO : 0.135 (15 H); SIT with 30 s at FiO : 0.209 (30 N); and FiO : 0.135 (30 H). VO did not significantly increase, however time-to-exhaustion (TTE) was found to be significantly longer in the post test compared to pre test ( = 0.001) with no difference between groups ( = 0.86). Mean power (MPw.kg) after repeated wingate tests was significantly higher compared to pre training in all groups ( = 0.001) with no difference between groups ( = 0.66). Similarly, CP was increased in all groups with 4 weeks of SIT ( = 0.001) with no difference between groups ( = 0.82). This study showed that 4 weeks of SIT with 15 and 30 s sprint bouts in normoxia or hypoxia did not increased VO in trained athletes. However, anerobic performance and CP can be increased with 4 weeks of SIT both in normoxia or hypoxia with 15 or 30 s of sprint durations.