title: Modeling the responses to resistance training in an animal experiment study.
abstract: The aim of the present study was to test whether systems models of training effects on performance in athletes can be used to explore the responses to resistance training in rats. 11 Wistar Han rats (277 ± 15 g) underwent 4 weeks of resistance training consisting in climbing a ladder with progressive loads. Training amount and performance were computed from total work and mean power during each training session. Three systems models relating performance to cumulated training bouts have been tested: (i) with a single component for adaptation to training, (ii) with two components to distinguish the adaptation and fatigue produced by exercise bouts, and (iii) with an additional component to account for training-related changes in exercise-induced fatigue. Model parameters were fitted using a mixed-effects modeling approach. The model with two components was found to be the most suitable to analyze the training responses (R(2) = 0.53; P < 0.001). In conclusion, the accuracy in quantifying training loads and performance in a rodent experiment makes it possible to model the responses to resistance training. This modeling in rodents could be used in future studies in combination with biological tools for enhancing our understanding of the adaptive processes that occur during physical training.
authors.affiliation: INRA, UMR866 Dynamique Musculaire et Métabolisme, Université de Montpellier, 34000 Montpellier, France.
authors.forename: Antony G
authors.initials: AG
authors.lastname: Philippe
authors.affiliation: INRA, UMR866 Dynamique Musculaire et Métabolisme, Université de Montpellier, 34000 Montpellier, France.
authors.forename: Guillaume
authors.initials: G
authors.lastname: Py
authors.affiliation: INRA, UMR866 Dynamique Musculaire et Métabolisme, Université de Montpellier, 34000 Montpellier, France.
authors.forename: François B
authors.initials: FB
authors.lastname: Favier
authors.affiliation: Département STAPS, Laboratoire Européen Performance Santé Altitude, Université de Perpignan, EA 4604, Via Domitia, 66120 Font-Romeu, France.
authors.forename: Anthony M J
authors.initials: AM
authors.lastname: Sanchez
authors.affiliation: INRA, UMR866 Dynamique Musculaire et Métabolisme, Université de Montpellier, 34000 Montpellier, France.
authors.forename: Anne
authors.initials: A
authors.lastname: Bonnieu
authors.affiliation: Laboratoire de Physiologie de l'Exercice, Université de Lyon, 42000 Saint-Etienne, France.
authors.forename: Thierry
authors.identifier: 0000-0002-5042-4384
authors.initials: T
authors.lastname: Busso
authors.affiliation: INRA, UMR866 Dynamique Musculaire et Métabolisme, Université de Montpellier, 34000 Montpellier, France.
authors.forename: Robin
authors.initials: R
authors.lastname: Candau
mesh_terms: D000222:Adaptation, Physiological / Q000502:physiology; D032761:Animal Experimentation; D000818:Animals; D008297:Male; D008954:Models, Biological; D018763:Muscle Fatigue / Q000502:physiology; D010805:Physical Conditioning, Animal / Q000502:physiology*; D010807:Physical Endurance / Q000502:physiology*; D051381:Rats; D017208:Rats, Wistar; D055070:Resistance Training / Q000379:methods