| This dissertation was designed to fulfill three objectives: (1) to quantitate the differences in oxygen uptake (VO2) and mechanical work in level versus uphill running, (2) to propose two refinements for measuring external power output during the Wingate Anaerobic Test (WAT), and (3) to evaluate the metabolic and thermo-regulatory responses to skin wetting during running.; Seven males performed overground (OG) and treadmill (TM) running at two grades (0% and 5%) over a range of speeds between 136-286 m/min. No significant differences were found between the VO2 of TM vs overground running at either of the grades examined.; In a subsequent study, 8 males ran at 188 m/min at 0, 5, 10, and 15% grades. Internal work, measured by the link segment approach, decreased with increasing % grades. Previously, formulas used to estimate VO2 had assumed that internal work (i.e.-horizontal component) remained constant.; The WAT is a 30 s test of external power output performed on a cycle ergometer. Since flywheel (FW) velocity decreases over the course of the test, kinetic energy stores contribute to the total power output. Correcting for this factor lowered peak power, mean power, and % fatigue by 6.2%, 3.0%, and 6.6%, respectively in 8 male subjects (P {dollar}<{dollar}.05). The measurement of external power output using a Monark 864 weight ergometer was found to require the placement of a load cell in series with the FW belt.; During distance running, the total energy expenditure results in heat production, since no net external work is done. The responses to this treatment during a 2-hr run were examined under two different humidity conditions (29.5 C, 33 or 66% RH). Spraying had no effect on rectal temperature, heart rate, VO2, sweat loss, or % change in plasma volume. |
