Abstract

Models of fatigue are based on physiological parameters such as Critical Power (CP) and Anaerobic Work Capacity (AWC). CP is a theoretical threshold value that a human can generate for an indefinite amount of time and AWC represents a finite expendable amount of anaerobic energy at intensities above CP. There is an increasing interest in developing mathematical models of energy expenditure and recovery for athletic training and human performance. The objective of this research is to propose and validate a model for recovery of AWC during a post exertion recovery interval of cycling. A cycling ergometer study is proposed which involves a VO2max ramp test to determine gas exchange threshold, a 3-min all-out intensity test to determine CP and AWC, and exertion-recovery interval tests to understand recovery of AWC. The results will be used to build a human in the loop control system to optimize cycling performance.

Highlights

  • The onset of fatigue can be understood as the moment at which a human is unable to continue a physical exercise at a specified intensity

  • Blood lactate and VO levels cannot attain a steady state while exercising above Critical power (CP) and classified as the severe intensity domain [3]

  • This paper presents a new protocol to determine the behavior of recovery of Anaerobic Work Capacity (AWC)

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Summary

Introduction

The onset of fatigue can be understood as the moment at which a human is unable to continue a physical exercise at a specified intensity. Exercise intensity has been classified as severe, high, and moderate based on blood lactate levels [1], maximum oxygen uptake (VO2max) [2,3], and power output [3]. Exercise intensity is often defined based on the concept of critical power by Monod and Sherrer [4]. Prolonged exercise can be carried out below CP as blood lactate and VO levels can attain a steady state and exercising in this domain is classified as either moderate or high intensity [3]. Blood lactate and VO levels cannot attain a steady state while exercising above CP and classified as the severe intensity domain [3]. CP marks the threshold between high and severe intensity exercise

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