著者

仙石 泰雄 中村 和照 緒形 ひとみ 吉岡 利貢 渡部 厚一 鍋倉 賢治 徳山 薫平

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.57, no.2, pp.285-294, 2008-04-01 (Released:2008-08-13)

参考文献数

24

被引用文献数

2 2

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The present study was conducted to obtain basic information about blood glucose fluctuation and relation with race performance during 100 km marathon. Subcutaneous glucose of one well-trained runner was measured by continuous glucose monitoring system (CGMS) at 5 min interval and blood samples for biochemical analysis were drawn at pre, middle and post of the race. Energy balance during one week prior to the 100 km race was recorded, and the whole energy and fluid intake during the race was analyzed. Blood glucose fluctuated reflecting duration of exercise and energy supply during the race. During the latter part of the race (65–70 km), abrupt declines in blood glucose level, which reflected insufficient carbohydrate intake before the race (119 g), were accompanied by decrease in running speed. The present report suggests that continuous glucose monitoring supplemented with standard nutritional and physiological measurement provides precise and valuable information on runner’s energy state during the ultra-endurance race, and that athletes need to reassess their preparation for the race and planning of energy intake during the race.

著者

吉岡 利貢 森 健一 鍋倉 賢治

出版者

社団法人日本体育学会

雑誌

日本体育学会大会予稿集

巻号頁・発行日

no.62, 2011-09-25

著者

江波戸 智希 廣重 陽介 吉岡 利貢 広瀬 統一

出版者

一般社団法人 日本アスレティックトレーニング学会

雑誌

日本アスレティックトレーニング学会誌 (ISSN:24326623)

巻号頁・発行日

vol.7, no.1, pp.75-84, 2021-10-31 (Released:2021-11-26)

参考文献数

29

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股関節・鼠径部痛(Groin Pain:以下GP)の既往者におけるランニング動作の特徴を3次元動作解析を用いてバイオメカニクス的に明らかにすることを目的とした.過去1年間に股関節・鼠径部に痛みを有したことがある脚,11脚を股関節・鼠径部痛群(GP群)とし,痛みの既往がない脚,14脚をコントロール群(C群)として検討を行った.結果,GP群のランニングの特徴として支持期において遊脚側の骨盤が下制しているトレンデレンブルグ徴候が認められた.また股関節は内転位となり,足関節は回外から回内への角度変化が少なかった.GPのリハビリテーション・予防にはランニング動作における骨盤,股関節,足関節運動の改善の必要性が示唆された.

著者

吉岡 利貢 中垣 浩平 篠田 知之 鍋倉 賢治

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.53, no.6, 2004-12-01

著者

後藤 一成 石井 直方 吉岡 利貢 高松 薫

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.54, no.6, 2005-12-01

著者

吉岡 利貢 中垣 浩平 中村 和照 向井 直樹 鍋倉 賢治

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.57, no.1, pp.237-248, 2012 (Released:2012-06-02)

参考文献数

29

被引用文献数

4 2

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The purpose of this study was to compare the physiological and morphological characteristics of J. Ndambiri, a Kenyan world-class long-distance runner (10,000 m personal best: 27:04.79), with runners belonging to the national corporate team (29:32.18±0:30.35). Oxygen uptake (VO2), heart rate, blood lactate concentration and stride frequency were measured during submaximal exercise on a treadmill (270, 290, 310, 330, 350 and 370 m/min velocities with 1% inclination). Peak oxygen uptake (VO2peak) was determined during the maximal exercise test. In addition, morphological parameters (length of thigh and shank, maximum circumference of thigh and shank, and cross-sectional area of the trunk, thigh and shank muscles) were determined using a tape measure and magnetic resonance imaging (MRI). Ndambiri was superior to Japanese runners in terms of not only running economy (65.0 vs 69.8±1.9 ml/kg/min at 330 m/min), but also blood lactate concentration (1.50 vs 2.59±0.74 mmol/l at 330 m/min), heart rate (159.8 vs 170.8±4.0 bpm at 330 m/min) during the submaximal running test and VO2peak (80.8 vs 76.3±2.4 ml/kg/min). In addition, the morphological characteristics of Ndambiri were also quite different from those of Japanese runners. In particular, Ndambiri's maximum shank circumference was much smaller than that of Japanese runners (32.0 vs 35.8±1.8 cm). Furthermore, the cross-sectional area of the gastrocnemius muscle, which composes the shank, was significantly correlated with the oxygen cost of running at 330 m/min (r=0.700). These findings indicate that the superior performance of Ndambiri is attributable to various factors such as a higher VO2peak, lower blood lactate concentration and heart rate, as well as running economy. In the future, it will be necessary to clarify the factors supporting these relationships between physiological variables and morphological characteristics.

著者

吉岡 利貢 中垣 浩平 向井 直樹 鍋倉 賢治

出版者

一般社団法人 日本体育学会

雑誌

体育学研究 (ISSN:04846710)

巻号頁・発行日

vol.54, no.1, pp.89-98, 2009-06-30 (Released:2009-11-05)

参考文献数

26

被引用文献数

4 5

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The aim of this study was to determine the relationship between muscle morphological characteristics and running performance. Eighteen elite Japanese male distance runners (10000 m, seasonal best time 29:39.74±0:32.54) completed five 4-min submaximal and approximately 10-min maximal progressive treadmill tests to determine running economy (VO2 at submaximal velocity) and maximal oxygen uptake (VO2max). Axial images of the trunk, thigh and shank muscles were taken by magnetic resonance imaging (MRI). From these images, cross-sectional areas (CSAs) of the psoas major, quadriceps femoris, rectus femoris, vastus muscle, hamstring, sartoris, adductor magnus, adductor longus, gracilis, triceps surae, soleus and gastrocnemius were measured. The CSAs were divided by lean-body-mass0.67 measured by air-displacement plethysmography. The mean running economy (VO2 at 310 m/min) was 70.9 ml/kgLBM/min and VO2max was 82.0±4.3 ml/kgLBM/min (76.1±3.2 ml/kgBM/min). Simple correlation analysis revealed a negative association between hamstring CSA and 10000 m time (r=−0.681, p<0.05). On the other hand, quadriceps femoris CSA was positively associated with 10000 m time (r=0.637, p<0.05). Furthermore, triceps surae CSA was significantly correlated with running economy (r=0.573, p<0.05). Thus, these results suggest that hamstring CSA can explain long distance as well as sprint performance.

著者

白井 祐介 品田 貴恵子 吉岡 利貢 鍋倉 賢治

出版者

一般社団法人 日本体育学会

雑誌

体育学研究 (ISSN:04846710)

巻号頁・発行日

vol.59, no.1, pp.263-274, 2014 (Released:2014-06-13)

参考文献数

30

被引用文献数

2 1

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The aim of this study was to investigate the effect of differences in stroke rate (SR) on energy expenditure during rowing. Oxygen uptake (VO2) was measured under different SR conditions with the same power output. Eight male collegiate rowers (age: 21.6±1.4 yr, height: 171.1±1.8 cm, weight: 68.7±1.9 kg) participated in the study. First, they performed an incremental test on a rowing ergometer to determine power output at the blood lactate threshold (PLT). On other days, they performed 6 different SR trials maintaining their power output at 80% PLT (80% LT test) and 90% PLT (90% LT test), respectively. During the 80% and 90% LT tests, each subject used a triaxial accelerometer sensor placed on the back, and integrals of the absolute value of the accelerometer output from three directions (IAA) were calculated as an index of physical activity level. The most economical SR, at which VO2 was lowest, was found at 80% and 90% LT. In both tests, a higher IAA was observed with increasing SR. Under SR conditions higher than the economical point, there was a significant correlation between the increasing amount of IAA (ΔIAA) and VO2 (ΔVO2) from the economical SR during the 90% LT test (r=0.673, P<0.001). There were strong correlations (r>0.9) between IAA and VO2 in many subjects at a SR higher than the economical point. These results suggest that there is an economical SR point with the same power output during rowing. Additionally, an increasing amount of VO2 associated with IAA at a higher SR than the economical point. This suggests that IAA is useful for estimation of energy expended by the moving body during rowing.

著者

森 健一 吉岡 利貢 白松 宏輔 苅山 靖 尾縣 貢

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.60, no.5, pp.503-510, 2011 (Released:2011-11-15)

参考文献数

31

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The purpose of this study was to investigate the influence of physiological factors which effect oxygen kinetics and energy system contribution on the power of Wingate test (WT), with focusing on the difference of aerobic capacity. Twenty three male track and field athletes (sprinters, long distance runners and decathletes) performed the WT on electromagnetic-braked cycle ergometer. The applied resistance was 7.5% of body weight, and the duration was 60 seconds. Moreover, aerobic capacity (maximal oxygen uptake [VO2max]) was determined by an incremental test, and anaerobic capacity (maximal accumulated oxygen deficit [MAOD]) was determined by a supramaximal constant load test. The oxygen uptake during each test was recorded by a breath-by-breath method. The participants were divided into two group which was high VO2max group (High group; n = 11) and low VO2max group (Low group; n = 12). In the results, although the VO2max was significantly higher in the High group, the MAOD was not significantly different between two groups. The oxygen uptake during WT was significantly higher in the High group, and the accumulated oxygen deficit during WT was significantly higher in the Low group. The aerobic contribution was significantly higher in the High group than in the Low group. In contrast, the anaerobic contribution was significantly higher in the Low group than in the High group. These results suggest that by the difference of aerobic capacity, aerobic and anaerobic energy supply contribution was different in WT.

著者

森 健一 吉岡 利貢 苅山 靖 尾縣 貢

出版者

一般社団法人 日本体育学会

雑誌

体育学研究 (ISSN:04846710)

巻号頁・発行日

vol.57, no.1, pp.275-284, 2012 (Released:2012-06-02)

参考文献数

37

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The purpose of this study was to verify the applicability of the Wingate test (WT) for evaluation of anaerobic capacity and performance in sprinters, based on the relationships among the maximal accumulated oxygen deficit (MAOD) during cycling, accumulated oxygen deficit (AOD-WT), and output power during the WT.   Eight 400-m sprinters (SP group; 49.29±1.56 s) and six decathletes (DC group; 50.29±1.27 s) participated. They performed the WT on an electromagnetically braked cycle ergometer. The applied resistance was 7.5% of body weight, and the duration was 60 s. Moreover, anaerobic capacity (MAOD) was determined using a supramaximal constant load test. The oxygen uptake during each test was recorded using the breath-by-breath method.   The results were as follows: 1) There was no significant difference between MAOD during cycling and AOD-WT, and a significant correlation between these parameters was evident. 2) In the SP group, there were significant correlations between 400-m performance and MAOD during cycling, and the mean power at 30 s in the WT. However, no significant correlations were observed in the DC group.   These results suggest that in sprinters, the applicability of the WT for evaluation of anaerobic capacity and sprint performance differs between cycling exercise and running exercise.