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Men and women in hypoxia : the influence of tissue oxygenation on repeated-sprint ability

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dc.contributor.advisor Billaut, Francois
dc.contributor.advisor Copeland, Jennifer
dc.contributor.author Smith, Kurt
dc.contributor.author University of Lethbridge. Faculty of Arts and Science
dc.date.accessioned 2011-10-30T23:18:19Z
dc.date.available 2011-10-30T23:18:19Z
dc.date.issued 2010
dc.identifier.uri http://hdl.handle.net/10133/2548
dc.description ix, 108 leaves : ill. ; 29 cm en_US
dc.description.abstract This thesis examined the impact of oxygen (O2) availability on prefrontal cortex and muscle tissue oxygenation during repeated-sprint exercise (RSE) in men and women. Men and women matched for initial-sprint mechanical work performed during ten, 10-s sprints (30s of rest) in normoxia (21% FIO2) and acute hypoxia (13% FIO2). Mechanical work and arterial O2-saturation (SPO2) were obtained for every sprint. Oxy- and deoxygenated haemoglobin concentrations (O2Hb, HHb) were obtained via near-infrared spectroscopy. Hypoxia elicited lower SPO2 and work (14.8% & 7.4%, P < 0.05), larger (45.1%, P < 0.05) and earlier reductions in cortical oxygenation, and no differences between sexes. Cortical de-oxygenation and work decrement were strongly correlated (R2=0.85, P < 0.05). Muscle de-oxygenation was greater in men than women (67.3%, P < 0.05). These results show that O2 availability influences cortical oxygenation and performance equally in men and women, and suggest a more efficient muscle O2 uptake in women. en_US
dc.language.iso en_US en_US
dc.relation.ispartofseries Thesis (University of Lethbridge. Faculty of Arts and Science) en_US
dc.subject Anoxemia en_US
dc.subject Oxygen -- Physiological effect en_US
dc.subject Oxygen in the body en_US
dc.subject Cerebral anoxia en_US
dc.subject Muscles -- Physiology en_US
dc.subject Sports -- Physiological aspects en_US
dc.subject Exercise -- Physiological aspects en_US
dc.subject Exercise tests en_US
dc.subject Athletes -- Physiology en_US
dc.subject Women athletes -- Physiology en_US
dc.subject Dissertations, Academic en_US
dc.title Men and women in hypoxia : the influence of tissue oxygenation on repeated-sprint ability en_US
dc.type Thesis en_US
dc.publisher.faculty Arts and Science en_US
dc.publisher.department Department of Physical Education and Kinesiology en_US

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