Abstract

PURPOSE: To evaluate the effects of moderate normobaric hypoxia on the parameters of the work-time relationship during upper body exercise in women. METHODS: Thirteen recreationally active women (age: 22.7 ± 2.6 y; height: 167 ± 8.6 cm; weight: 66.4 ± 9.7 kg; body fat: 27.6 ± 5% body fat) completed a graded exercise test in both normobaric hypoxia (H; FiO2=~14%) and normoxia (N; FiO2=~20%) to exhaustion on an arm ergometer to determine V̇ O2peak and peak power output (PPO). Each participant completed four constant work-rate arm-cranking tests at 90-120% PPO in both environmental conditions. Linear regression was used to estimate CP and AWC via the work-time relationship during the constant work-rate tests. Paired samples t tests compared mean differences between V̇ O2peak, PPO, CP and AWC between conditions (N vs. H). Two-way (condition × intensity) repeated measures ANOVA was used to compare total work and time-to-exhaustion. RESULTS: H significantly reduced VO2peak (N: 1.73L/min ± .31L/min vs. H: 1.62L/min ± .27L/min, (p=.008) but had minimal effects on PPO (N: 78.08W±14.51W vs. H: 75.38W±13.46, p=.089), CP (N: 57.44W±18.89W vs. H: 56.01W±12.36W, p=.546), and AWC (N: 4.81kJ±1.01kJ vs. H: 4.56kJ±.91kJ, p=.510). No significant condition × intensity interactions were noted for total work or time-to-exhaustion (p > .05). CONCLUSIONS: Moderate normobaric hypoxia significantly reduced VO2peak but had minimal effects on CP and AWC using the work-time model.

Graduation Date

2018

Semester

Summer

Advisor

Fukuda, David

Degree

Master of Science (M.S.)

College

College of Education and Human Performance

Department

Educational and Human Sciences

Degree Program

Sport and Exercise Science

Format

application/pdf

Identifier

CFE0007259

URL

http://purl.fcla.edu/fcla/etd/CFE0007248

Language

English

Release Date

August 2018

Length of Campus-only Access

None

Access Status

Masters Thesis (Open Access)

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