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PHYSIOLOGICAL DIFFERENCES BETWEEN FIT AND UNFIT COLLEGE-AGE MALES DURING EXERCISE IN NORMOBARIC HYPOXIA

Bliss, Matthew Vern
http://rave.ohiolink.edu/etdc/view?acc_num=kent1382384591

Abstract Details

2013, PHD, Kent State University, College of Education, Health and Human Services / School of Health Sciences.
Previous research suggests that physical activity may result in to decreases in arterial saturation (SaO2) and cerebral blood flow when exposed to a low oxygen environment between aerobically fit and unfit males. Purpose: The purpose of this study was to determine differences in SaO2, cerebral blood flow, minute ventilation (VE), and blood lactate between fit and unfit young males during exercise in hypoxia compared to normoxia. Methods: Apparently healthy college age males took part in two trials consisting of normobaric normoxia and normobaric hypoxia (12% oxygen). Fit (n = 3; VO2max = 51.5 ml &#xbf; kg-1 &#xbf; min-1 &#xb1; 3.1) and Unfit (n = 3; VO2max = 34.4 ml &#xbf; kg-1 &#xbf; min-1 &#xb1; 5.6) males cycled at 50% of their altitude adjusted VO2max (-26% of normoxia VO2max) for one hour after a two-hour baseline. Results: SaO2, cerebral blood flow, and RER were significantly decreased during hypoxia in all subjects (P < 0.05), but did not differ between groups. An interaction showed that Fit subjects had a higher SaO2 during exercise in hypoxia (P < 0.05). VE and lactate was greater during hypoxia (P < 0.05). The Fit group demonstrated a higher VE during exercise in hypoxia (P < 0.05). No differences in blood lactate were found between the two groups. Conclusion: The data suggests that when exposed to hypoxia aerobically unfit males may demonstrate decrements in oxygen utilization which may lead to decreases in physical activity and/or performance.
Ellen Glickman, Ph.D. (Committee Chair)
Jacob Barkley, Ph.D. (Committee Member)
John Gunstad, Ph.D (Committee Member)
67 p.
Environmental Health; Health; Physiology
Hypoxia; Normoxia; Altitude; Exercise; Cerebral Blood Flow; Cerebral Oxygenation; Near Infrared Spectroscopy; Arterial Saturation; Cycling Exercise; Fitness Level; Brain Blood Flow; Lactate; Physiology

Recommended Citations

Citations

  • Bliss, M. V. (2013). PHYSIOLOGICAL DIFFERENCES BETWEEN FIT AND UNFIT COLLEGE-AGE MALES DURING EXERCISE IN NORMOBARIC HYPOXIA [Doctoral dissertation, Kent State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=kent1382384591

    APA Style (7th edition)

  • Bliss, Matthew. PHYSIOLOGICAL DIFFERENCES BETWEEN FIT AND UNFIT COLLEGE-AGE MALES DURING EXERCISE IN NORMOBARIC HYPOXIA. 2013. Kent State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=kent1382384591.

    MLA Style (8th edition)

  • Bliss, Matthew. "PHYSIOLOGICAL DIFFERENCES BETWEEN FIT AND UNFIT COLLEGE-AGE MALES DURING EXERCISE IN NORMOBARIC HYPOXIA." Doctoral dissertation, Kent State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=kent1382384591

    Chicago Manual of Style (17th edition)

kent1382384591
9,159
© 2013, some rights reserved.Creative Commons License PHYSIOLOGICAL DIFFERENCES BETWEEN FIT AND UNFIT COLLEGE-AGE MALES DURING EXERCISE IN NORMOBARIC HYPOXIA by Matthew Vern Bliss is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by Kent State University and OhioLINK.