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

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dc.contributor.authorSmith, Kurt
dc.contributor.authorUniversity of Lethbridge. Faculty of Arts and Science
dc.contributor.supervisorBillaut, Francois
dc.contributor.supervisorCopeland, Jennifer
dc.date.accessioned2011-10-30T23:18:19Z
dc.date.available2011-10-30T23:18:19Z
dc.date.issued2010
dc.degree.levelMasters
dc.descriptionix, 108 leaves : ill. ; 29 cmen_US
dc.description.abstractThis 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.identifier.urihttps://hdl.handle.net/10133/2548
dc.language.isoen_USen_US
dc.publisher.departmentDepartment of Physical Education and Kinesiologyen_US
dc.publisher.facultyArts and Scienceen_US
dc.relation.ispartofseriesThesis (University of Lethbridge. Faculty of Arts and Science)en_US
dc.subjectAnoxemiaen_US
dc.subjectOxygen -- Physiological effecten_US
dc.subjectOxygen in the bodyen_US
dc.subjectCerebral anoxiaen_US
dc.subjectMuscles -- Physiologyen_US
dc.subjectSports -- Physiological aspectsen_US
dc.subjectExercise -- Physiological aspectsen_US
dc.subjectExercise testsen_US
dc.subjectAthletes -- Physiologyen_US
dc.subjectWomen athletes -- Physiologyen_US
dc.subjectDissertations, Academicen_US
dc.titleMen and women in hypoxia : the influence of tissue oxygenation on repeated-sprint abilityen_US
dc.typeThesisen_US
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