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Purpose: The purpose of this investigation was to examine the ability to sustain a maximal running effort. Furthermore, the effects of aerobic fitness level, gender, anaerobic capacity, efficiency of energy production and utilization, and lactate threshold on maximal performance were examined. Methods: Maximal oxygen consumption (VO2max), ventilatory threshold (VT) and anaerobic capacity (AC) were determined for 22 subjects. Subjects then performed a treadmill test to exhaustion to determine the time spent at VO2max, time spent at the velocity (run speed) associated with 100% VO2max (vVO2max), and the time it took to reach VO2max at vVO2max. Statistical analysis included one-way ANOVA by gender, VO2max, gender/VO2max and VO2max/AC. Tukey's post-hoc tests were done to determine location of significance. Pearson product-moment correlations were performed between physiologic variables [VO2max, AC, VT, gross efficiency (GE) and net efficiency (NE)] and maximal run performance (time spent at VO2max and vVO2max, and time to reach VO2max). Results: Average time spent at VO2max was 0.79±0.13 minutes and time spent at vVO2max was 2.36±0.20 minutes. No differences in maximal run performance were observed between high fit (HF) and low fit (LF) groups; however, females spent significantly longer time at VO2max and vVO2max compared with males (p Conclusions: VO2max does not appear to be directly related with the ability to sustain a maximal run performance, while females spent a longer time at VO2max and vVO2max than males. GE and NE showed a moderately positive relationship with time at vVO2max and time to reach VO2max.
Gross and Net Efficiency, Anaerobic Capacity, Ventilatory Threshold, Time to Reach VO2max, vVO2max, VO2max
Date of Defense
June 30, 2010.
A Thesis Submitted to the Department of Nutrition, Food & Exercise Sciences in Partial Fulfillment of the Requirements for the Degree of Master of Science.
Includes bibliographical references.
Florida State University
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