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最終更新日：2024/03/27

山岸卓樹

ヤマギシタカキ (Takaki Yamagishi)

論文

タイトル
タイトル（英）: Physiological and Metabolic Responses to Low-Volume Sprint Interval Exercises: Influence of Sprint Duration and Repetitions
参照URL: https://researchmap.jp/7000019636/published_papers/45765066
著者
著者（英）: Takaki Yamagishi,Soya Iwata,Shun Otsuka,Hoshizora Ichinose,Yasuo Kawakami
担当区分: 筆頭著者,責任著者
概要
概要（英）: ABSTRACT Purpose This study aimed to determine physiological and metabolic responses to two different sprint interval exercises (SIE) matched for total sprint duration and sprint-to-rest ratio. Methods After having measured peak oxygen uptake (V̇O_2peak), fourteen healthy males (27.1 ± 4.8 years, 169.6 ± 6.0 cm, 64.5 ± 8.4 kg, V̇O_2peak: 47.2 ± 7.7 ml·kg^-1·min^-1) performed four 10-s sprints with 80-s recovery (SIE10) and two 20-s sprints with 160-s recovery (SIE20) on different occasions in a counterbalanced crossover manner. Pulmonary V̇O₂ and changes in tissue oxygenation index (∆TOI) at vastus lateralis (VL) and rectus femoris (RF) were measured during the SIEs. Furthermore, T2-weighted MRI was taken immediately before and after the SIEs to determine the activation levels of VL, RF, vastus medialis, vastus intermedius, adductor magnus, biceps femoris long head, semitendinosus and semimembranosus at 50% of right thigh length. Results In SIE10, increases in V̇O₂ and ∆TOI at VL and RF plateaued after the second sprint, whereas session-averaged ∆TOI was greater in SIE20 than SIE10 in both muscles (VL: 20.9 ± 7.4 vs. 14.2 ± 5.9%, RF: 22.8 ± 9.3 vs. 12.9 ± 6.6%, p = 0.00). While both SIEs significantly increased T2 values in all eight muscles, those magnitudes were similar between the conditions (SIE10 vs. SIE20: 5-16 vs. 8-16%). Conclusions This study showed blunted responses of whole-body (V̇O₂) and peripheral (∆TOI) oxidative responses with successive sprints (sprint 1 < sprint 2-4) in SIE10, suggesting that increasing sprint repetitions does not necessarily induce greater oxidative metabolism or stimulus. Moreover, greater peripheral oxygen extraction (∆TOI) was achieved with SIE20, whereas %changes of T2 indicates that the thigh muscles were similarly activated between the SIE conditions.
出版者・発行元
出版者・発行元（英）: Ovid Technologies (Wolters Kluwer Health)
誌名
誌名（英）: Medicine & Science in Sports & Exercise
巻: Online Published
号
開始ページ
終了ページ
出版年月: 2024年3月7日
査読の有無: 査読有り
招待の有無
掲載種別: 研究論文（学術雑誌）
ISSN: 0195-9131
DOI URL: https://doi.org/10.1249/mss.0000000000003420
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