title: 4 weeks of high-intensity interval training does not alter the exercise-induced growth hormone response in sedentary men.
abstract: This study determined the effects of high-intensity interval training on the exercise-induced growth hormone (GH) responses, whole body and regional fat content. Twenty-four sedentary males were randomized to either a high-intensity interval training (HIT) group or a low-intensity continuous training (LT) group. The HIT group performed intermittent exercises at 85% of [Formula: see text], whereas the LT group performed continuous exercise for 22 min at 45% of [Formula: see text]. Before and after 4 weeks of training, hormonal and metabolic responses to acute exercise were determined. Acute exercise significantly increased GH concentrations in both groups (p < 0.05). However, the responses did not change after training period in either group. Furthermore, the training did not significantly affect intramyocellular or intrahepatic lipid content in either group. The present study indicates that 4 weeks of high-intensity interval training does not alter the exercise-induced GH responses, whole body fat mass or intramyocellular and intrahepatic lipid content in sedentary males.
authors: Graduate School of Sport and Health Science, Ritsumeikan University, Shiga, Japan.
authors: Hiroto
authors: H
authors: Sasaki
authors: Graduate School of Sport and Health Science, Ritsumeikan University, Shiga, Japan.
authors: Takuma
authors: T
authors: Morishima
authors: Graduate School of Sport and Health Science, Ritsumeikan University, Shiga, Japan.
authors: Yuta
authors: Y
authors: Hasegawa
authors: Graduate School of Sport and Health Science, Ritsumeikan University, Shiga, Japan.
authors: Ayaka
authors: A
authors: Mori
authors: Graduate School of Sport and Health Science, Ritsumeikan University, Shiga, Japan.
authors: Toshiaki
authors: T
authors: Ijichi
authors: Graduate School of Sport and Health Science, Ritsumeikan University, Shiga, Japan ; Faculty of Sport and Health Sciences, Ritsumeikan University, 1-1-1, Nojihigashi, Kusatsu, Shiga 525-8577 Japan.
authors: Toshiyuki
authors: T
authors: Kurihara
authors: Graduate School of Sport and Health Science, Ritsumeikan University, Shiga, Japan ; Faculty of Sport and Health Sciences, Ritsumeikan University, 1-1-1, Nojihigashi, Kusatsu, Shiga 525-8577 Japan.
authors: Kazushige
authors: K
authors: Goto
keywords: Ectopic fat; Endocrine response; Fat metabolism; Intensive exercise; Obesity