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Int J Sports Med 2015; 36(08): 666-671
DOI: 10.1055/s-0034-1390466
Training & Testing
© Georg Thieme Verlag KG Stuttgart · New York

Planned Overreaching and Subsequent Short-term Detraining Enhance Cycle Sprint Performance

Y. Hasegawa
1   Graduate School of Sports & Health Science, Ritsumeikan University, Kusatsu, Japan
,
T. Ijichi
1   Graduate School of Sports & Health Science, Ritsumeikan University, Kusatsu, Japan
,
Y. Kurosawa
2   Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Japan
,
T. Hamaoka
2   Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Japan
,
K. Goto
2   Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Japan
› Author Affiliations
Further Information

Publication History



accepted after revision 18 August 2014

Publication Date:
06 May 2015 (online)

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Abstract

We investigated the effect of a training program consisting of planned overreaching and subsequent short-term detraining on sprint performance. 24 physically active men participated in an 18-day sprint-training program. They were divided into 2 groups: the overreaching-detraining (OR-DT) and the control (CON) groups. Subjects in the OR-DT group performed 12 consecutive days of maximal cycle sprint training followed by 6 days of detraining, whereas a rest day was provided after every 2 successive training days for the CON group. Peak power output during maximal pedaling increased significantly after 6 days of detraining in the OR-DT group compared with the baseline (P<0.05), whereas no change was observed in CON group. Intramuscular phosphocreatine concentration increased significantly after 12 days of daily training in the OR-DT group (69.3±45.8% increase vs. baseline, P<0.05), and it was maintained after the detraining period (46.6±33.6% increase vs. baseline, P<0.05). However, no change was observed in CON group. No significant changes in blood variables were observed after the training period except significant reduction of serum cortisol in the CON group. Daily sprint training and subsequent short-term detraining enhanced peak power output after the detraining period.

Key words

overtraining - rest distribution - phosphocreatine - magnetic resonance spectroscopy - anaerobic power - sprint training
 

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