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Fatigue and fitness modelled from the effects of training on performance
Authors:Thierry Busso  Robin Candau  Jean-René Lacour
Affiliation:(1) Faculté de Médecine Saint-Etienne, Laboratoire de Physiologie- GIP Exercice, France;(2) Faculté de Médecine Lyon-Sud, Laboratoire de Physiologie- GIP Exercice, France;(3) Present address: UFR STAPS, Université de Franche-Comté, F-25030 Besançon Cedex, France;(4) Hôpital de Saint-Jean-Bonnefonds, Pavillon 12, CHU de Saint-Etienne, F-42055 Saint-Etienne Cedex 2, France
Abstract:Summary The purpose of this study was to compare two ways of estimating both fatigue and fitness indicators from systems model of the effects of training on performance. The model was applied to data concerning the training of a hammer thrower. The variations in performance were mathematically related to the successive amounts of training. The model equation was composed of negative (NF) and positive (PF) functions. The NF and PF were associated with the fatigue and fitness estimated in previous studies. Using another method, fatigue and fitness indicators were estimated from a combination of NF and PF. The influence of training on performance was negatively associated with fatigue (NI), and positively to fitness (PI). The changes in performance were well described by the model in the present study (r = 0.96,N = 19,P<0.001). Significant correlations were observed between NF and NI (r = 0.93,P < 0.001) on the one hand and between PF and PI (r = 0.90,P < 0.001) on the other. The absolute values and the time variations of PI and NI were closer to the change in performance than NF and PF. The NF and PF were accounted for mainly by the accumulation of amounts of training. On the other hand, NI and PI were accounted for rather by the impact of these amounts of training on performance.
Keywords:Modelling  Systems theory  Physical training  Hammer throwing
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