Graduate Research and Discovery Symposium (GRADS)


Dr. Gregory Mocko

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Models of fatigue are based on physiological parameters such as Critical Power (CP) and Anaerobic Work Capacity (AWC). CP is a theoretical power that can be maintained indefinitely and AWC is a finite anaerobic energy reservoir for efforts above CP. There is an increasing interest in developing mathematical models of energy expenditure and recovery for athletic training and performance. Recently, researchers have developed formal mathematical models that aid in better management of performance. Most available models have originated from cycle ergometer tests due to the ease of measuring power in cycling. The objectives of this research are (i) to develop a testing protocol to understand expenditure and recovery of AWC in cycling, (ii) to establish AWC recovery profiles in terms of recovery powers and durations, and (iii) to combine AWC recovery with expenditure for energy management in cycling. Nine recreational cyclists performed a study which involved a VO2max ramp test to determine gas exchange threshold (GET), a 3-min all-out intensity test (3MT) to determine CP and AWC, and 9 intermittent cycling tests to understand recovery of AWC. Three cyclists completed all tests resulting in a complete profile of the AWC recovery. The results indicate that AWC recovered during recovery decreases with increasing recovery powers. No generic trends were observed in AWC recovery with respect to recovery durations. In addition, the tests indicate the need for individualized models owing to the inherent within-subject variability (WSV) associated with CP and AWC. Quantifying this WSV will aid in accurately modelling and optimizing performance.