文献一覧: 相澤勝治 (著者)

5 0 0 0 OA 急速減量によるアスリートのエネルギー代謝変動

著者: 久木留毅相澤勝治岡田藍徳山薫平河野一郎
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.56, no.4, pp.429-436, 2007-08-01 (Released:2007-09-14)
参考文献数: 31
被引用文献数: 3 3

[Objective] This study examined the effects of resting metabolic rate (RMR), sleeping metabolic rate (SMR), and diet-induced thermogenesis (DIT) during acute weight loss in elite male wrestlers.[Methods] Subjects were elite male wrestlers (n=6), who were instructed to reduce the body weight in seven days. RMR, SMR, and DIT were measured by indirect calorimetry in normal training phase and after rapid weight loss. Body composition and energy intake were also measured.[Results] Energy intake significantly decreased in rapid weight loss phase (P<0.05). After the rapid weight reduction, percent reduction of body weight (-4.4%), fat mass (-17.5%), and total body water (-3.2%) significant compare with that of normal training phase (P<0.05). RMR(-15.2%), and SMR (-11.8%) significantly decreased during acute weight loss (P<0.05). DIT(-89.4%) tended to be decrease during acute weight loss.[Conclusion] The present study suggests that rapid weight loss in elite male wrestlers causes decreases in RMR and SMR.

2 0 0 0 OA 性ホルモンと骨格筋

著者: 相澤勝治
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.65, no.5, pp.455-462, 2016-10-01 (Released:2016-10-03)
参考文献数: 47
被引用文献数: 2

The plasticity of skeletal muscle facilitates adaptation to various stimuli. Sex steroid hormones (androgens and estrogens) are involved in a variety of physiological and pathological processes. In skeletal muscle, sex steroid hormones affect growth, strength, metabolism, and antioxidant levels and are associated with exercise-induced skeletal muscular adaptation. Sex steroid hormone levels also decrease with aging and are thought to be a factor in muscle atrophy. Though sex steroid hormones play an important role in skeletal muscular homeostasis, the role of the endocrine system in muscle plasticity is unknown. Sex steroid hormones are synthesized from cholesterol by steroidogenic enzymes, such as 3β-hydroxysteroid dehydrogenase (HSD), and 17β-HSD, with testosterone being irreversibly converted to estrogen by aromatase cytochrome P450 (P450arom). Testosterone is also converted into its bioactive metabolite dihydrotestosterone (DHT) by 5α-reductase. Sex steroid hormones are produced by various peripheral target tissues including the kidney, liver, and brain in addition to endocrine organs such as the testis or ovary in the recent research. For instance, steroidogenic enzymes expressed in skeletal muscle have been reported to locally synthesize sex steroid hormones from circulating dehydroepiandrosterone (DHEA) or testosterone in response to exercise. Thus, local steroidogenesis in skeletal muscle provides further evidence for the presence of an autocrine/paracrine system for sex steroid hormones and their roles in skeletal muscle function and adaptation. This review focuses on the steroidogenesis of skeletal muscle and discusses the physiological significance of the sex steroid hormones network of circulation and skeletal muscle.

2017-05-13 05:33:04
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2 0 0 0 症例・事例報告レスリング競技におけるスポーツ医科学情報の戦略的活用--実践活用システムの構築

著者: 相澤勝治久木留毅
出版者: 日本トレーニング科学会
雑誌: トレーニング科学 (ISSN:13494414)
巻号頁・発行日: vol.20, no.2, pp.151-157, 2008
被引用文献数: 1

2012-08-09 23:02:08
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https://ci.nii.ac.jp/naid/40016626382

1 0 0 0 OA 若年女性の月経周期に伴う動的・静的バランス能力の変化

著者: 林ちか子池田瑞音相澤勝治村井文江目崎登
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.2, pp.197-203, 2004-04-01
被引用文献数: 3 2

The purpose of this study was to evaluate the change in dynamic and static balance ability during the menstrual cycle among young women. The subjects were young healthy women (n = 12, age 20.4 ± 1.2 years) with regular exercise and a normal menstrual cycle. The menstrual cycle was divided into 5 phases : Menstrual, Follicular, Ovulatory, Early luteal and Late luteal. Measurements were taken using the dynamic balance test, static balance test and looseness test. The dynamic balance test did not change during the menstrual cycle. Length/Time within the static balance test increased in the late luteal phase compared to other menstrual cycle phases. The deviation of the mean of X within the static balance test increased in the follicular and late luteal phase and decreased in the ovulatory phase. Also, the deviation of the mean of X increased in the follicular phase compared to the menstrual phase and decreased in the menstrual and early luteal phases compared to the follicular and ovulatory. Left arm upper of laxity in hand on the back test within looseness test increased in the menstrual and early luteal phases compared to other menstrual cycle phases. These results suggest that static balance ability changes during the menstrual cycle.

2021-12-18 06:54:11
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1 0 0 0 骨格筋における性ホルモン産生

著者: 目崎登前田清司家光素行相澤勝治
出版者: 帝京平成大学
雑誌: 基盤研究(B)
巻号頁・発行日: 2005

本研究では,性ホルモンの合成組織として骨格筋に着目し,その合成経路が運動により亢進することにより,性ホルモン合成の亢進に寄与するという仮説を立証することを目的とする.上記の研究課題を明らかにするために,骨格筋における性ホルモン合成酵素の発現の有無と局所性ホルモン代謝動態について検討した(研究課題I).さらに,運動による骨格筋内の性ホルモン産生経路を明らかにするために,運動が骨格筋内の性ホルモン合成酵素に及ぼす影響とその性差について検討した(研究課題II).その結果,骨格筋における性ホルモン産生機序に着目し,骨格筋内の性ホルモン合成酵素の遺伝子・タンパク発現が存在することを確認し,骨格筋には性ホルモン代謝経路が存在し,局所にて性ホルモンを産生する器官となりうる可能性を明らかにした(研究課題I).また,骨格筋内の性ホルモン合成酵素の遺伝子・タンパク発現には性差があり,運動刺激に対するそれらの発現応答にも性差があるという結果を得たことから(研究課題II),運動による骨格筋の適応機序に局所の性ホレモン代謝が関与している可能性が示された.それゆえ,運動による性ホルモン作用は,内分泌経路の他に,末梢組織(骨格筋)における局所の性ホルモン産生が重要な役割を果たしている可能性が示された.