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Influence of Hypoxi...
Influence of Hypoxic Interval Training and Hyperoxic Recovery on Muscle Activation and Oxygenation in Connection with Double-Poling Exercise
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- Zinner, Christoph (författare)
- Univ Wurzburg, Dept Sport Sci, D-97070 Wurzburg, Germany.;Mid Sweden Univ, Dept Hlth Sci, Swedish Winter Sports Res Ctr, Ostersund, Sweden.
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- Hauser, Anna (författare)
- Swiss Fed Inst Sport, Sect Elite Sport, Magglingen, Switzerland.
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- Born, Dennis-Peter (författare)
- Univ Wurzburg, Dept Sport Sci, D-97070 Wurzburg, Germany.
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- Wehrlin, Jon P. (författare)
- Swiss Fed Inst Sport, Sect Elite Sport, Magglingen, Switzerland.
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- Holmberg, Hans-Christer (författare)
- Mittuniversitetet,Avdelningen för hälsovetenskap,Swedish Winter Sports Research Center,Mittuniversitetet, Avdelningen för hälsovetenskap, Sweden
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- Sperlich, Billy (författare)
- Mittuniversitetet,Avdelningen för hälsovetenskap,Univ Wurzburg, Dept Sport Sci, D-97070 Wurzburg, Germany.,Swedish Winter Sports Research Center,Mittuniversitetet, Avdelningen för hälsovetenskap, Sweden
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Univ Wurzburg, Dept Sport Sci, D-97070 Wurzburg, Germany;Mid Sweden Univ, Dept Hlth Sci, Swedish Winter Sports Res Ctr, Ostersund, Sweden. Swiss Fed Inst Sport, Sect Elite Sport, Magglingen, Switzerland. (creator_code:org_t)
- 2015-10-15
- 2015
- Engelska.
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Ingår i: PLOS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 10:10
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Abstract
Ämnesord
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- Here, we evaluated the influence of breathing oxygen at different partial pressures during recovery from exercise on performance at sea-level and a simulated altitude of 1800 m, as reflected in activation of different upper body muscles, and oxygenation of the m. triceps brachii. Ten well-trained, male endurance athletes (25.3 +/- 4.1 yrs; 179.2 +/- 4.5 cm; 74.2 +/- 3.4 kg) performed four test trials, each involving three 3-min sessions on a double-poling ergometer with 3-min intervals of recovery. One trial was conducted entirely under normoxic (No) and another under hypoxic conditions (Ho; FiO2 = 0.165). In the third and fourth trials, the exercise was performed in normoxia and hypoxia, respectively, with hyperoxic recovery (HOX; FiO2 = 1.00) in both cases. Arterial hemoglobin saturation was higher under the two HOX conditions than without HOX (p<0.05). Integrated muscle electrical activity was not influenced by the oxygen content (best d = 0.51). Furthermore, the only difference in tissue saturation index measured via near-infrared spectroscopy observed was between the recovery periods during the NoNo and HoHOX interventions (P<0.05, d = 0.93). In the case of HoHo the athletes' P-mean declined from the first to the third interval (P < 0.05), whereas P-mean was unaltered under the HoHOX, NoHOX and NoNo conditions. We conclude that the less pronounced decline in P-mean during 3 x 3-min double-poling sprints in normoxia and hypoxia with hyperoxic recovery is not related to changes inmuscle activity or oxygenation. Moreover, we conclude that hyperoxia (FiO2 = 1.00) used in conjunction with hypoxic or normoxic work intervals may serve as an effective aid when inhaled during the subsequent recovery intervals.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap -- Idrottsvetenskap (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Health Sciences -- Sport and Fitness Sciences (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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