著者

Hayao Ozaki Takashi Abe Alan E. Mikesky Akihiro Sakamoto Shuichi Machida Hisashi Naito

出版者

一般社団法人日本体力医学会

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.4, no.1, pp.43-51, 2015-03-25 (Released:2015-03-23)

参考文献数

69

被引用文献数

2 13

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This paper reviews the existing literature about muscle hypertrophy resulting from various types of training to document the significance of mechanical and metabolic stresses, and to challenge the conventional ideas of achieving hypertrophy that exclusively rely on high-load resistance training. Low-load resistance training can induce comparable hypertrophy to that of high-load resistance training when each bout or set is performed until lifting failure. This is attributable to the greater exercise volume and metabolic stress achieved with low-load exercise at lifting failure, which, however, results in a prolonged exercise bout. Endurance exercises (walking and cycling) at moderate intensity are also capable of eliciting muscle hypertrophy, but at much slower rates (months rather than weeks) in limited muscle or age groups. Blood flow restriction (BFR) in working muscles, however, accelerates the development of metabolic fatigue, alleviating the time consuming issue associated with low-load or endurance training. These alternative training methods, however, cannot completely replace conventional high-load resistance training, which provides superior strength gain as well as performance improvement even for trained individuals. The alternative approaches, therefore, may be considered for those who are less enthusiastic or under certain medical conditions, or who have limited or no access to proper equipment. However, people should be aware that low-load resistance training or endurance training entails substantial effort and/or discomfort at lifting failure or with BFR. Understanding the advantages and disadvantages of each method will help in assigning the most suitable training program for each client’s goals and needs.

著者

TAKASHI ABE YOSHIMITSU KOHMURA KOYA SUZUKI YUKI SOMEYA JEREMY P. LOENNEKE SHUICHI MACHIDA HISASHI NAITO

出版者

The Juntendo Medical Society

雑誌

順天堂醫事雑誌 (ISSN:21879737)

巻号頁・発行日

pp.JMJ23-0017-P, (Released:2023-07-24)

参考文献数

21

被引用文献数

4

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Handgrip strength as a biomarker is being studied as a factor in predicting disease onset. However, the effect of improving handgrip strength through physical exercises, such as sports during the developmental period, on disease prevention has yet to be fully elucidated. The Juntendo Fitness Plus (J-Fit Plus) Study is a unique database of anthropometric and physical fitness measurements with over 50 years of accumulated data. It has the potential to explore the effects of sports on the association between handgrip strength and morbidity/mortality. We first outline previous studies on the impact of physical exercise interventions on handgrip strength, separated into adulthood and developmental period. We then introduced a unique effort to investigate the effects of sports using the J-Fit Plus Study database and describe the challenges of finally elucidating the impact of exercise on the association between handgrip strength and health status.

著者

永澤 貴昭 黒坂 裕香 田中 智美 町田 修一 湊 久美子 Takaaki NAGASAWA Yuka KUROSAKA Tomomi HASEGAWA-TANAKA Shuichi MACHIDA Kumiko MINATO

出版者

和洋女子大学

雑誌

和洋女子大学紀要 = The journal of Wayo Women's University (ISSN:18846351)

巻号頁・発行日

vol.64, pp.97-105, 2023-03-01

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運動部に所属する男子大学生アスリートの食事調査結果を用いて、栄養摂取状況の特徴を評価した。さらに、食品群別摂取頻度による評価点を算出して、エネルギー、栄養素摂取量や各栄養素摂取量による評価点との関連性を検討し、アスリートの食生活バランスの評価に用いることができる簡易な方法について考察することを目的とした。食事調査の結果、対象集団にはエネルギー、栄養素摂取量が身体活動量に見合わないものが複数いた。一方で、サプリメントやプロテインを利用している者が多数おり、食事に関して無関心ではないことが窺われた。食品群別摂取頻度による評価点を用いた簡易な食生活評価法については、たんぱく質、鉄、カルシウム、ビタミンB1など、アスリートにとって重要な栄養素摂取量との有意な関連性を認めた。さらに、食品群別摂取頻度の得点と8項目のエネルギーと栄養素摂取量を、食事摂取基準の推奨量ならびにアスリートの推奨量と比較して得点化した栄養素摂取量評価得点を算出し関連について分析を行ったところ、有意な関連性が認められた。10種の食品群別摂取頻度を把握することは、アスリートの食生活とそれに付随する栄養摂取状況の概要について評価することができると考えられ、栄養アセスメントの一次的なスクリーニング評価に活用できる可能性が示唆された。

著者

Mitsutoshi Kurosaka Shuichi Machida

出版者

一般社団法人日本体力医学会

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.1, no.3, pp.537-540, 2012-09-25 (Released:2012-10-23)

参考文献数

32

被引用文献数

1 1

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Skeletal muscle injury is generally caused by stimuli, such as intense resistance training, eccentric muscle contraction, muscle strain and bruising. Injured skeletal muscles are repaired within several weeks after injury, because skeletal muscle has a remarkable capacity for muscle regeneration. Cellular and molecular events underlying the regenerative processes are mainly regulated by myogenic stem cells and inflammatory cells. The aim of this review is to summarize the current understanding of the cellular and molecular mechanisms responsible for muscle regeneration. In this review, focus will be given to the critical roles of satellite cells and macrophages during muscle regeneration. In addition, the satellite cell responses to exercise are also discussed.