There are several studies suggesting that short but high intensity strength exercise in the morning improves performance in the afternoon (1). There are several different factors that could lead to performance benefits. Some authors have suggested performance benefits are due to higher afternoon testosterone levels after morning exercise, but also other mechanisms including body temperature and neural mechanisms are plausible (2). The aim of this study was to research whether power or maximal strength exercise performed in the morning affects performance in the afternoon within a 4-6-hour time window. Seven national level youth ice-hockey players participated in the study. The participants were 18-20 years old. In the morning at 10AM subjects performed maximal or power strength training or rested. In the afternoon at 4PM subjects performed a visual multiple-choice reaction time test, countermovement jump, bench press with 50% of 1RM and 1RM isometric leg press. In addition, body temperature was measured with an aural thermometer in the morning and in the afternoon before the experiments. In this study either of morning high intensity exercises did not improve afternoon performance in any measured variable compared to the control afternoon (p>0.05). Also, afternoon body temperature was unchanged by morning exercise (p>0.05). According to this study high intensity exercise in the morning does not improve or decrease performance in the afternoon. Consequently, athletes can accomplish high intensity exercise on the day of competition. Contact: Rajalainen, Ville; Korte, Ville; Ahtiainen, Juha: Neuromuscular Research Center, Biology of Physical Activity, Faculty of Sport and Health Sciences, University of Jyväskylä, Finland
© Copyright 2020 19th International Symposium "Modern Science and Practice for Strength and Endurance Training" October 10-12, 2018. Veröffentlicht von Neuromuscular Research Center and Biology of Physical Activity, Faculty of Sport and Health Sciences, University of Jyväskylä. Alle Rechte vorbehalten.