巻号一覧
54 巻, 5 号
選択された号の論文の5件中1～5を表示しています
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原著
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渡邊 將司, 〓井 省三2005 年 54 巻 5 号 p. 353-361
発行日: 2005年
公開日: 2006/12/01
ジャーナル フリー本研究の目的はジュニア競泳選手の短距離泳パフォーマンスに影響を及ぼす要因を分析するとともに, それらが年齢に伴ってどのように変化するかを明らかにすることである. 被験者は8～10歳, 11～12歳, 13～14歳, 15～18歳の4グループに区分された8～18歳の男子114名, 女子130名である. パフォーマンス (個人の50m泳のベストタイム) には体格, 筋力, 柔軟性, ストローク効率が強く影響していると仮定した. 11項目の測定値に因子分析を実施し, 体格因子, 筋力因子, そして柔軟性因子を抽出した. 因子分析から抽出された3因子とストローク効率で構成される重回帰モデルに多母集団の同時分析を性別, 年齢群別に実施した. 男女とも14歳以下では, ストローク効率のパフォーマンスへの影響が最も強かった. 15歳以上では, 男子は筋力因子のパフォーマンスへの影響が最も強くなり, 女子では体格因子が最も強くなった. 競技歴がストローク効率に及ぼす影響は小さかった. この結果, ストローク効率のパフォーマンスへの影響は低年齢で強く, 年齢とともに弱まるが, 反面, 体格因子と筋力因子は低年齢で影響が弱く, 年齢とともに強まることを示唆している.抄録全体を表示PDF形式でダウンロード (249K) -
引原 有輝, 齊藤 愼一, 吉武 裕2005 年 54 巻 5 号 p. 363-372
発行日: 2005年
公開日: 2006/12/01
ジャーナル フリーThe purpose of this study was to assess the validity of activity record (AR), accelerometer (AC) and heart rate (HR) methods in comparison with the doubly-labeled water (DLW) method as the criterion measure of total energy expenditure (TEE) in high school students undergoing vigorous activities. Twelve baseball players in Japanese high school (16.5±0.5 yrs) were monitored for seven consecutive days. TEE values obtained over a 3-day-period by AR, AC and HR were simultaneously validated against TEE measured by DLW over a 7-day-period. TEE value measured by DLW was 4922±391 kcal/day. The Physical activity level (PAL=TEE/BMR (basal metabolic rate)) was 2.66±0.14. TEE estimated by AR, AC and HR was significantly different from DLW, with mean differences of -13.9±6.5%, 35.3±3.6% and 31.6±23.9%, respectively. However, TEE estimated by AC and AR significantly correlated with that measured by DLW (r=0.73, r=0.70, p<0.05, respectively). The limits of agreement between DLW and AR, AC and HR were from -1350 kcal/d to -21 kcal/d, -2293 kcal/d to -1192 kcal/d, and 3875 kcal/d to -797 kcal/d respectively. AC was superior to the other methods. However, the limits of agreement in AR were similar to AC. These data suggest that on accuracy and precision, AR would be superior to the other two for predicting TEE in high school students undergoing vigorous activities. However, AC has the advantages being able to examine patterns of activity over long periods of time without interfering with normal movement and the ability to store data continuously over long periods of time. Therefore, it was suggested that, simultaneously, the AR and AC methods are accurate predictors of TEE and patterns of activity while undergoing sports vigorous activities.抄録全体を表示PDF形式でダウンロード (274K)
教育講座
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永富 良一2005 年 54 巻 5 号 p. 373-379
発行日: 2005年
公開日: 2006/12/01
ジャーナル フリーLymphopenia, or decreased NK cell counts or activity after exercise are often referred to as immunosuppression. But unlike lymphopenia of HIV infection, which is an absolute loss of CD4 T cells, exercise or stress induces transient redistribution of lymphocytes which eventually will be recovered. Similarly NK cells may leave and come into the circulation in response to physical exercise and various stressors, both good and bad. Redistribution of CD4 T cells is mediated mainly by glucocorticoid in the blood stream, while NK cells are regulated by sympathetic outflow. The clinical significance of these fluctuation remains to be elucidated, but unlikely to lead to increased susceptibility to infection or cancer. They may rather be considered as a practical marker to know the activities of HPA axis or sympathetic activity.抄録全体を表示PDF形式でダウンロード (180K)
記事
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2005 年 54 巻 5 号 p. 381-388
発行日: 2005年
公開日: 2006/12/01
ジャーナル フリーPDF形式でダウンロード (153K) -
2005 年 54 巻 5 号 p. 389-391
発行日: 2005年
公開日: 2006/12/01
ジャーナル フリーPDF形式でダウンロード (70K)
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