著者

永澤 健 白石 聖

出版者

一般社団法人 日本体育・スポーツ・健康学会

雑誌

体育学研究 (ISSN:04846710)

巻号頁・発行日

vol.56, no.2, pp.423-433, 2011 (Released:2011-12-28)

参考文献数

27

被引用文献数

6 9

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In this study, we examined the effects of static stretching (SST) for different durations on muscle oxygen saturation (StO2) and muscle blood flow (BFmus) in the stretched muscles during and after SST. Nine healthy male subjects received passive SST of the wrist flexors. SST was performed for 10, 30, and 60 s. The StO2 and BFmus in the forearm flexor muscles were measured by near-infrared spectroscopy. BFmus was determined from the rate of increase in total hemoglobin during venous occlusion. StO2 decreased immediately at the start of stretching, and thereafter kept decreasing until the end of SST. StO2 replenished rapidly after completion of SST and remained above the resting level during the recovery period. For all 3 durations of SST, the peak value of StO2 during the recovery period after SST showed a significant increase above the resting value (p<0.01) (10-s SST: 72.5±2.8%, 30-s SST: 72.5±1.8%, 60-s SST: 73.0±2.2%). There was no significant difference in the increase in the peak values of StO2 after SST among the 3 SST durations. For all durations of SST, BFmus after SST increased significantly above the resting level (p<0.01) (10-s SST: 2.6±1.2 fold, 30-s SST: 2.8±1.6 fold, 60-s SST: 2.9±1.0 fold), but there was no significant difference in the increase of BFmus after SST among the 3 SST durations. These results show that SST of wrist flexors for 10 s, 30 s, and 60 s induced an increase in StO2 and BFmus after SST, but the increase in StO2 and BFmus was not affected by SST duration.

著者

永澤 健 白石 聖

出版者

畿央大学

雑誌

基盤研究(C)

巻号頁・発行日

2015-04-01

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食後の短時間のストレッチングが血糖値を降下させるかどうか調べるとともに,血管拡張と動脈弾性指標(CAVI)に及ぼすストレッチングの急性効果を検討した.その結果,短時間のストレッチング,は血糖値を降下させる急性の作用があることが示唆され,さらに,吐き気と疲労感を伴うことなく,酸化ストレスの上昇もなく実施できたことから,食後の血糖値管理のための有効な運動療法になり得るものと考えられた.一過性のストレッチングは伸長した体肢の血管拡張を引き起こす作用があることが示された一方,動脈弾性指標の改善は認められなかった.

著者

髙橋 将 佐藤 真太郎 白石 聖 川本 竜史

出版者

特定非営利活動法人 国際エクササイズサイエンス学会

雑誌

国際エクササイズサイエンス学会誌 (ISSN:24337722)

巻号頁・発行日

vol.5, no.1, pp.15-22, 2022 (Released:2023-01-24)

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[目的]本研究では野球の投球速度に関連する因子として肩関節や股関節の筋力・可動域に着目し, 球速の因子を明らかにすることで投手の投球パフォーマンス向上に役立つ科学的知見の提供を目指した.[対象と方法]対象は部活動に所属し, 試合で実践的に投球している大学生野球投手20名であった. 測定では, 徒手筋力計測器および撮影画像を用いて肩および股関節の可動域, 筋力を測定した.[結果]ステップワイズ法を用いて重回帰分析した結果, 支持脚の股関節外旋可動域と股関節外旋筋力の2変数を独立変数とする有意な回帰式が得られ, その寄与率は51%であった.[結語]球速の51%は支持脚股関節の外旋筋力, 外旋可動域の要因で説明できることが明らかとなった.

著者

藤岡 正子 佐古 隆之 木目 良太郎 村瀬 訓生 長田 卓也 下村 浩祐 白石 聖 勝村 俊仁 佐藤 和人

出版者

イセブ

雑誌

日本運動生理学雑誌 (ISSN:13403036)

巻号頁・発行日

vol.17, no.2, pp.35-42, 2010-07

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The purpose of this study was to determine whether 6 weeks handgrip endurance exercise training affects resting muscle metabolic rate in forearm flexor muscles. Eight healthy female subjects (22±0yr) performed dynamic handgrip exercise training until exhaustion at 30% of maximum voluntary contraction, 1Hz (0.5s contraction, 0.5s relaxation). Aerobic exercise for localized muscle training was carried out for 1 set per day, 5 days a week, for 6 weeks. Resting muscle metabolic rate, and time constant for phosphocreatine (PCr) recovery as an index of muscle oxidative capacity were measured using ^<31>P magnetic resonance spectroscopy (^<31>P-MRS) pre- and post-training. Performance time was evaluated during handgrip exercise at 30% MVC. The time constant tended to be shorter post-training (46.6±2.9s) compared with pre-training (50.7±2.8s) (p=0.07). After training, the performance time (84.5±5.8s) was significantly longer than pre-training (52.9±3.5s) (p<0.05). No significant difference of resting metabolic rate was found between pre- and post-training (5.8±0.4, 6.0±0.3μM ATP/s pre- and post-training, respectively). These results suggest that the resting muscle metabolic rate in forearm flexor muscles was unchanged by localized aerobic exercise training, even though muscle endurance capacity improved.

著者

白石 聖稀 李 根浩 豊田 彬敏 米倉 裕貴 野口 尚人

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

pp.16-00471, (Released:2017-04-14)

参考文献数

10

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This paper addresses the mechanical issue of a novel wheel design capable of step climbing toward more convenient utilization of assist vehicles such as wheelchairs and walkers. Despite the promotion of barrier-free environments, uneven floors with dips and depressions, thresholds, and steps have still been encountered in our daily routines. To overcome these difficulties, a step-climbing mechanism and its device are developed, allowing wheeled robots to ascend a step where its height is higher than the radius of the wheel. By applying the proposed step-climbing device into the robot, it enables potential users to minimize a physical burden during step climbing. This helps the users live independently and maintain their daily routines, not requiring caregivers and/or medical staff. What is the most important aspect from the practical point of view is how to realize the mechanism without additional wheels and linear guides. This paper describes the mechanical design by controlling axial translation in detail. By using a robotic wheelchair equipped with the proposed device, extensive evaluations are tested and analyzed.

著者

藤岡 正子 佐古 隆之 木目 良太郎 村瀬 訓生 長田 卓也 下村 浩祐 白石 聖 勝行 俊仁

出版者

日本体力医学会

雑誌

体力科學 (ISSN:0039906X)

巻号頁・発行日

vol.56, no.6, 2007-12-01