caa a22 4500 46905493X CHVBK 20180323132840.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF00705080 doi (NATIONALLICENCE)springer-10.1007/BF00705080 Oxygen uptake during swimming in a hypobaric hypoxic environment [Elektronische Daten] [Futoshi Ogita, Izumi Tabata] Summary: The purpose of this study was to determine oxygen uptake $$\dot V$$ O2) at various water flow rates and maximal oxygen uptake ( $$\dot V$$ O2max) during swimming in a hypobaric hypoxic environment. Seven trained swimmers swam in normal [N; 751 mmHg (100.1 kPa)] and hypobaric hypoxic [H; 601 mmHg (80.27 kPa)] environments in a chamber where atmospheric pressure could be regulated. Water flow rate started at 0.80 m · s−1 and was increased by 0.05 m· s−1 every 2 min up to 1.00 m · s−1 and then by 0.05 m · s−1 every minute until exhaustion. At submaximal water flow rates, carbon dioxide production ( $$\dot V$$ CO2), pulmonary ventilation ( $$\dot V$$ E) and tidal volume (V T) were significantly greater in H than in N. There were no significant differences in the response of submaximal $$\dot V$$ O2, heart rate (f c) or respiratory frequency (f R) between N and H. Maximal $$\dot V$$ E,f R,V T,f c blood lactate concentration and water flow rate were not significantly different between N and H. However, $$\dot V$$ VO2max under H [3.65 (SD 0.11) l · min−1] was significantly lower by 12.0% (SD 3.4) % than that in N [4.15 (SD 0.18) l · min−1] . This decrease agrees well with previous investigations that have studied centrally limited exercise, such as running and cycling, under similar levels of hypoxia. Springer-Verlag, 1992 Hypobaric hypoxic condition nationallicence Swimming nationallicence Maximal oxygen uptake nationallicence Tidal volume nationallicence Ogita Futoshi Department of Physiology and Biomechanics, National Institute of Fitness and Sports, Shiromizu-cho I, Kanoya City, 891-23, Kagoshima Prefecture, Japan aut Tabata Izumi Department of Physiology and Biomechanics, National Institute of Fitness and Sports, Shiromizu-cho I, Kanoya City, 891-23, Kagoshima Prefecture, Japan aut European Journal of Applied Physiology and Occupational Physiology Springer-Verlag 65/2(1992-03-01), 192-196 0301-5548 65:2<192 1992 65 421 https://doi.org/10.1007/BF00705080 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00705080 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ogita Futoshi Department of Physiology and Biomechanics, National Institute of Fitness and Sports, Shiromizu-cho I, Kanoya City, 891-23, Kagoshima Prefecture, Japan aut NATIONALLICENCE 700 1- Tabata Izumi Department of Physiology and Biomechanics, National Institute of Fitness and Sports, Shiromizu-cho I, Kanoya City, 891-23, Kagoshima Prefecture, Japan aut NATIONALLICENCE 773 0- European Journal of Applied Physiology and Occupational Physiology Springer-Verlag 65/2(1992-03-01), 192-196 0301-5548 65:2<192 1992 65 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer