この研究論文では、中高齢者を対象とした動脈硬化度に対する有酸素性トレーニングの経時的検討により、血管拡張物質・NOの調節物質(apelin, adropin, ADMA)を介したNO産生の経時的な変化が動脈硬化度の低下効果に関連することを明らかにしました。

Dr. Shumpei Fujie is an Assistant Professor in Faculty of Sport and Health Science of Ritsumeikan University, and his research manuscript was accepted and published in Experimental Gerontology, which collaborated with Professor Motoyuki Iemitsu and Kiyoshi Sanada (Ritsumeikan University), Professor and Director Takafumi Hamaoka (Tokyo Medical University).

This study revealed that aerobic exercise training-induced changes in the time course of NO production via NO-regulating hormones (apelin, adropin, and ADMA) may participate in aerobic exercise training-induced improvements of central arterial stiffening with advancing age.

 Fujie S, Sanada K, Hamaoka T, Iemitsu M. Time-dependent relationships between exercise training-induced changes in nitric oxide production and hormone regulation. Exp Gerontol. 2022; 166: 111888.

本学部助教 前大純朗先生が、本学部教授 伊坂忠夫先生、特任助教 杉山敬先生、学部生 呉宇航さん、卒業生 ⻩猛さん、本研究科博士課程後期課程 大学院生 草川祐生さん、博士課程前期課程 修了生 桜井洸さん、鹿屋体育大学学長 金久博昭先生と共同で取り組まれた研究「Triceps brachii hypertrophy is substantially greater after elbow extension training performed in the overhead versus neutral arm position」が、「European Journal of Sport Science」に原著論文として掲載されました。

上腕の裏側に位置する上腕三頭筋は、肘関節の伸展と肩関節の伸展に作用する筋であり、その筋長はこれら二関節の角度の影響を受けます。本研究では、上腕三頭筋の筋長と肘関節および肩関節の角度との関係に着目し、上腕三頭筋がより伸ばされる上肢挙上位での肘関節伸展トレーニング（通称：オーバーヘッド・トライセプス・エクステンション）は、上肢下垂位で行う場合（通称：トライセプス・プッシュダウン）と比べ、上腕三頭筋の筋肥大の程度が1.4倍大きいことを明らかにしました。本研究の結果は、上腕三頭筋の筋肥大や加齢に伴う同筋の筋萎縮への対策を目的としたトレーニング・リハビリテーションプログラムを作成するうえで直接的に、また他のエクササイズ種目に応用するうえでも間接的に、重要な知見となると考えられます。

Journal website:

https://www.tandfonline.com/doi/full/10.1080/17461391.2022.2100279?scroll=top&needAccess=true

Sumiaki Maeo is an Assistant Professor in SHS, and his research manuscript “Triceps brachii hypertrophy is substantially greater after elbow extension training performed in the overhead versus neutral arm position” has been published in European Journal of Sport Science. In this study, he collaborated with Tadao Isaka (Professor in SHS), Takashi Sugiyama (Assistant Professor in SHS), Yuhang Wu (Undergraduate Student in SHS), Meng Huang (Graduate in SHS), Yuki Kusagawa (Graduate Student in SHS), Hikaru Sakurai (Graduate in master’s SHS), and Hiroaki Kanehisa (President at the National Institute of Fitness and Sports in Kanoya).

The triceps brachii is lengthened more in a overhead (shoulder-flexed) than neutral arm position, due to its bi-articular nature crossing the elbow and shoulder joints. This study demonstrated that triceps brachii muscle size was 1.4-fold more effectively increased by cable elbow extension training performed in the overhead than neutral arm position, suggesting that training at long muscle lengths promotes muscle hypertrophy. The results of this study will be directly useful in establishing training and rehabilitation programs aiming to maximize hypertrophy and counteract age-related sarcopenia of this muscle, while also being a good foundation for developing future studies using a similar approach with other muscles.

Journal website:

https://www.tandfonline.com/doi/full/10.1080/17461391.2022.2100279?scroll=top&needAccess=true