Periodized Training in Mice: Comparisons between Constant and Undulating Load Models

The purpose of this study was to compare the effects of undulating (UL) and constant load (CL) training models applied in Swiss mice. Twenty male mice were divided into 3 groups: (a) Control Group [CON; n=6]; (b) Undulating Group [ULG; n=7]; and (c) Constant Load Group [CLG; n=7]. Both training peri...

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Published inJournal of exercise physiology online Vol. 23; no. 4; p. 15
Main Authors Carvalho, Carlos Dellavechia de, Kalva-Filho, Carlos Augusto, Milioni, Fabio, Loures, Joao Paulo, Serrano, Vitor Siqueira, Silva, Adelino Sanchez Ramos, Papoti, Marcelo
Format Journal Article
LanguageEnglish
Published Duluth American Society of Exercise Physiologists 01.08.2020
Subjects
Analysis
Running
Brazil
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Summary:The purpose of this study was to compare the effects of undulating (UL) and constant load (CL) training models applied in Swiss mice. Twenty male mice were divided into 3 groups: (a) Control Group [CON; n=6]; (b) Undulating Group [ULG; n=7]; and (c) Constant Load Group [CLG; n=7]. Both training periods lasted 8 wks, 5 d*[wk.sup.-1], as prescribed in accordance with maximal speed reached during the incremental test (MaxS). The ULG trained through sessions classified as Endurance 1 (60 min at 40% MaxS), Endurance 2 (30 min at 60% MaxS), Endurance 3 (4 * 5 min at 100% MaxS), and Anaerobic (10 * 1 min at 120% MaxS). All sessions for CLG consisted of a 60-min duration at 60% of MaxS. Both training models induced positive adaptations until the 4th wk of training. However, these adaptations were not maintained during the last 4 wks, declining MaxS in relation to baseline. The CLG was able to accomplish only 69% of proposed training volume. However, the ULG was able to accomplish 94% of the proposed volume. Comparing the reasons for sessions failure, CLG presented higher number of dropouts related to unsatisfactory running (P-value = 0.008) and exhaustion (P-value = 0.001), while the ULG quit the sessions mainly due to injuries (P-value = 0.003). These results demonstrate that independently of the training model used, positive adaptations were induced up to the 4th-wk of training with high intensity sessions producing the larger amount of dropouts due primarily to injuries. Key Words: Aerobic Training, Maximal Speed, Mice, Running
ISSN:1097-9751
1097-9751