11 0 0 0 OA 小学校1年生から中学校3年生の体組成の特徴や発育による変化:Inbody470を用いて
- 著者
- 秋原 悠 小田 俊明 山本 忠志 曽我部 晋哉
- 出版者
- Japan Society of Human Growth and Development
- 雑誌
- 発育発達研究 (ISSN:13408682)
- 巻号頁・発行日
- vol.2020, no.89, pp.22-32, 2020 (Released:2020-12-25)
- 参考文献数
- 25
The purpose of this study was to clarify the characteristics of body composition of Japanese elementary and junior high school students. In this study, body composition was measured using a body composition analyzer (Inbody470).In this method, body composition take as a 4-components model (total body water/protein/mineral/body fat mass), and the subdivided data can be easily analyzed. Subjects that were included in this study total 791 students (Boys: 373, Girls: 418) from the 1st grade of elementary school to the 3rd grade of junior high school.As a result of the analysis, both the boys and girls height and weight gradually increased year by year. The amount of fat-free mass also increased, but body fat mass decreased in boys after the 6th grade of elementary school. For the girls, it increased year by year. The results showed the differences for each gender in all components since junior high school. In particular, there was a marked difference in the 3rd grade of junior high school (total body water: p < 0.001, protein: p < 0.001, mineral: p < 0.001, body fat mass: p < 0.001). In the 4-components, regardless of the age difference in junior high school students, only protein significantly increased in boys (p < 0.05). For the girls, total body water (p < 0.001), protein (p < 0.001), and minerals (p < 0.01) were significantly decreased, and body fat percentage (p < 0.001) was significantly increased.This study clarified the gender differences and age differences of the 4 components of the body. From these results, the deterioration of the body components especially for junior high school student girls were concerned, and the necessity of taking countermeasures in exercise habits and lifestyle habits were indicated.
3 0 0 0 05バ-26-口-14 東アフリカのトップランナーの下腿の形態は日本人と異なるのか?(05 バイオメカニクス,一般研究発表,2020東京オリンピック・パラリンピックと体育・スポーツ科学研究)
- 著者
- 国正 陽子 佐野 加奈絵 久野 峻幸 牧野 晃宗 小田 俊明 石川 昌紀
- 出版者
- 一般社団法人 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
- vol.66, 2015
2 0 0 0 OA 東アフリカ中長距離選手の圧倒的な走りの強さの秘訣に神経・筋腱機能から迫る
- 著者
- 石川 昌紀 KOMI V Paavo NICOL Caroline 小田 俊明 伊藤 章
- 出版者
- 大阪体育大学
- 雑誌
- 若手研究(B)
- 巻号頁・発行日
- 2011
東アフリカ中・長距離陸上競技選手の強さに着目し,生理的指標から競技力に関係する要因について調査されてきたが,決定的な要因は明らかにされていない.本研究は,彼らのランニングスタイルを可能にする筋腱の形態的特徴,さらに彼らの効率的な走行を可能にする筋腱の機能特性に着目し調査した.その結果,彼らの下腿の長いアキレス腱と短い腓腹筋の筋束長が効率的な走行を可能にしている点,またこれまでの通説と異なり,彼らの長いアキレス腱モーメントアームが走効率を高める上で重要であることが明らかとなった.つまり,彼らの高いランニング効率は,彼らの形態的特徴を生かした少ない筋活動での走行がキーになることが明らかとなった.
1 0 0 0 OA 剣道経験年数の違いによる左右脚のアキレス腱の形態と力学的特性について
- 著者
- 牧野 晃宗 岩崎 正徳 国正 陽子 久野 峻幸 佐野 加奈絵 村元 辰寛 村上 雷多 神﨑 浩 小田 俊明 石川 昌紀
- 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.61, no.2, pp.639-649, 2016 (Released:2016-12-14)
- 参考文献数
- 18
One of the most frequent injuries in Kendo athletes is Achilles tendinopathy in the left leg, for example Achilles tendon rupture. However, preventive approaches for Achilles tendinopathy in Kendo athletes have not been well considered. Therefore, the purpose of the present study was to examine differences in the architectures of the gastrocnemius muscle and Achilles tendon in relation to kendo training experience, and to examine the mechanical properties of the Achilles tendinous tissues (AT) in Kendo athletes in order to clarify why Achilles tendinopathy occurs in the left leg. Sixty-five Kendo male athletes with different periods of kendo training experience and 20 healthy male control subjects participated in this study. The architectural properties of the medial gastrocnemius muscle (MG) and Achilles tendon in both legs were measured using ultrasonography. In addition, 20 expert Kendo male athletes and healthy male controls pair-matched with the kendo athletes for body height and body mass were examined for their AT mechanical properties during passive dorsiflexion of both legs. The differences in the cross–sectional areas of the Achilles tendon and MG muscle between the left and right legs were greater in Kendo athletes with longer experience. Especially, the expert kendo athletes had lower AT stiffness and Young's modulus in the left leg than did the control subjects. These results suggest that kendo leads to specific Achilles tendon and muscle adaptation. These specific adaptations of the MG fascicles and AT may be one of the risk factors for Achilles tendon rupture in Kendo athletes.
1 0 0 0 OA 日本,ならびにケニア長距離選手の筋腱複合体の形態・機能に関する比較研究
本研究では,日本とケニアの長距離選手を対象に,下肢における筋と腱両組織の形態,ならびに力学特性を計測し,それらと競技パフォーマンスとの関連について検討することを目的とした.ケニア選手と日本選手の比較や,日本選手の中で競技力の異なる群の比較を行った結果,長距離走の競技力と,下肢や腱組織の形状,筋の硬さ,ならびに腱の柔らかさとが関連する可能性が示唆された.特に,足関節の受動トルク,ならびに筋のstiffnessはケニア選手で日本選手よりもそれぞれ52%,181%と非常に大きな差を示した.また,これらのパラメータは日本選手における競技力と高い正相関(それぞれR=0.58, 0.53)を示した.