著者
西井 匠 鋤柄 悦子 阿部 竜二 高石 鉄雄
出版者
一般社団法人日本体力医学会
雑誌
体力科学 (ISSN:0039906X)
巻号頁・発行日
vol.61, no.2, pp.251-258, 2012 (Released:2012-04-28)
参考文献数
35
被引用文献数
1 1

The purpose of this study was to reveal physiological conditions of commuter cyclist from the standpoint of multiple approaches. Ten male employees (37 ± 9 yr) who usually commute by bicycle participated in this study. Global Positioning System (GPS) was used to analyze their commuting route three-dimensionally. And heart rate was recorded simultaneously to determine their exercise intensity. Blood test, oral glucose tolerance test (OGTT), and maximal aerobic test was conducted in our laboratory. Semantic differential method (SD) questionnaire was conducted to clarify their feelings during and after their commute. The results of blood test and OGTT showed that all of determined values were good and no one exceeded the standard value. GPS log showed that subjects covered 13.3 ± 7.2 km and 40 ± 20 minute with integrating 201 ± 114 meter altitude gain per commute. Heart rate data showed 129 ± 12 bpm per commute. However, subjects demonstrated higher peak heart rate during their commute ranged between 157 and 181 bpm, we determined details by frequency distribution method. The data revealed that commuter cycling was consisted by aerobic exercise with intermittent vigorous intensity exercise. Despite of such a hard exercise cycling to work, the result of SD questionnaire indicated that subjects felt briskness with less tiredness when they commute. Commuter cycling with a higher than moderate exercise intensity, could have good physical and mental effects for employees.
著者
松浦 弘幸 伊藤 安海 根本 哲也 西井 匠 久保田 怜 中野 正博 玉川 雅章
出版者
バイオメディカル・ファジィ・システム学会
雑誌
バイオメディカル・ファジィ・システム学会誌 (ISSN:13451537)
巻号頁・発行日
vol.13, no.2, pp.53-62, 2011-10-20 (Released:2017-09-04)
参考文献数
9

人が日常的にロボットと共存する場面では,ロボットとの不用意な接触が原因とする力学的人体損傷が発生する.人に加えられる撃力のエネルギーは同じでも,人の部位により重篤となる撃力波形が異なり事から,身体部位ごとに損傷評価基準が異なる.我々は損傷評価モデルとして,人の転倒機序の分析モデルを提案した.人の転倒過程は(回転+自由落下運動)と仮定して,頭部,胸部,腹部,そして大腿部の損傷程度を見積もった.転倒モデルによる致命傷は,頭部骨折,胸部骨折,そして,腹腔内実質臓器の裂傷であり,その後の予後を大きく左右する.特に,頭部の損傷を評価する指標のHICは重要な概念であるが,他の部位には他の指標を用いた.さらに,撃力の吸収には,伸筋と屈筋が交互に振動をするように収縮・弛緩を繰り返し,あたかも,一個の粘弾性体の如く運動を行う.
著者
髙石 鉄雄 對馬 明 児玉 泰 西井 匠 小林 培男 渡邊 航平 秋間 広
出版者
一般社団法人日本体力医学会
雑誌
体力科学 (ISSN:0039906X)
巻号頁・発行日
vol.62, no.4, pp.331-341, 2013-08-01 (Released:2013-08-29)
参考文献数
53

This study evaluated the exercise profile (heart rate, cycling speed and pedal cadence) during 25-30 km cycling and fitness and health level for adults (11 males: 69.6 ± 4.7 yrs; 6 females: 66.3 ± 4.9 yrs) with a recreational cycling habit (27.6 ± 14.8 km/week). Exercise intensity at a constant speed on a flat road during male and female cycling was 71.2 ± 11.5 and 66.8 ± 11.4% heart rate reserved (HRR), respectively. Exercise intensity over 60% HRR occupied 72% of cycling time. Peak intensity during male and female cycling was 89.2 ± 8.9 and 93.1 ± 6.1% HRR, respectively. VO2max and CS (chair stand)-30 test for male and female were 40.3 ± 4.3 and 37.7 ± 2.4 ml/kg/min, and 30.8 ± 3.1 and 30.1 ± 3.2 times, respectively. The muscle cross-sectional area of thigh extensor and flexor measured by MRI were 55.4 ± 6.5 and 58.3 ± 13.3 cm2 for male, and 45.5 ± 6.4 and 50.2 ± 5.7 cm2 for female, respectively. Blood profile for HDL-C (cholesterol), LDL-C and HbA1c (JDS) for male and female were 65.9 ± 8.2 and 67.9 ± 10.6 mg/dl, 112.3 ± 32.0 and 130.6 ± 12.3 mg/dl, and 4.8 ± 0.4 and 4.7 ± 0.1%, respectively. Fitness level and blood profile results were superior to those of the same aged adults. We concluded that the exercise intensity of cycling by middle and older adults with a recreational cycling habit is high and their fitness and health level are higher than average adults.
著者
西井 匠
出版者
中京大学
雑誌
若手研究(B)
巻号頁・発行日
2007

本研究の目的は自転車のサスペンションが中高齢者の走行安定性におよぼす影響を明らかにすることであった。実験ではサスペンションの有無を設定できるシティサイクルを用い、歩道走行を想定した段差(3cm, 5cm)を乗り越えさせた。その結果、サスペンションなし条件では最大で約12Gの衝撃があったが、サスペンション設定によって6〜63%の衝撃緩和効果があった。その衝撃吸収効果により、ハンドル操作に関係する筋を過度に緊張させない効果もあった。