運動性疲勞課件可編輯

競技健美操的運動性疲勞王華燕周鳳萍劉明

1982年在美國舉行的第5屆國際運動醫(yī)學生物化學會議上對疲勞的定義是:機體生理過程不能維持預定的運動強度而導致機體運動能力下降的現(xiàn)象。

健美操運動員的疲勞定義：在健美操訓練或比賽達到一定程度后,運動員本身各組織器官及全身機能暫時下降的一種身體狀態(tài),也是機體自身正常的一種保護性抑制。能量物質耗竭產生疲勞—衰竭學說中樞神經(jīng)系統(tǒng)失調—保護性抑制學說

內環(huán)境物質代謝失調—內環(huán)境穩(wěn)定性失調學說產生機制競技健美操運動訓練是以無氧糖酵解供能為主的大強度運動，直接能量來源于骨骼肌中的ATP。Descriptionofthecontents訓練負荷的加大，體內肌糖元大量分解消耗，肌肉中發(fā)生ATP和CP的最大消耗和乳酸的最大堆積競技健美操訓練時出現(xiàn)HL值升高，血液PH值降低，發(fā)生代償性酸中毒，致使ATP合成量減少，影響肌肉運動能力，導致疲勞產生。競技健美操訓練ATP的合成主要依靠糖的無氧酵解能量物質耗竭產生疲勞—衰竭學說

內環(huán)境物質代謝失調—內環(huán)境穩(wěn)定性失調學說

機體內環(huán)境物質代謝功能失調能源物質消耗增多大運動量訓練以乳酸能為主要能量來源體內維生素含量下降以及無機鹽、水分等減少機體不能繼續(xù)工作而產生疲勞

保護性抑制學說認為，無論是腦力疲勞還是體力疲勞都是大腦皮層保護性抑制發(fā)展的結果競技健美操運動獨特的運動形式，使大量興奮沖動向大腦皮層相應的神經(jīng)細胞傳遞，當神經(jīng)細胞長時間興奮沖動導致能源物質消耗增多，消耗達到一定程度時，相應的神經(jīng)細胞便產生保護性抑制，出現(xiàn)中樞神經(jīng)的支配失調，運動能力下降，產生疲勞。

大運動量競技健美操訓練，大量的血液流入肌內而相應減少了對大腦的供求量，致使腦pH值下降，使大腦神經(jīng)細胞的供氧量暫時不足，造成運動能力下降而產生疲勞

中樞神經(jīng)系統(tǒng)失調—保護性抑制學說

教學觀察和自我觀察

生理機能檢查

生化指標評定

血乳酸血紅蛋白睪酮／皮質醇比值血清肌酸激酶

自我監(jiān)督教學觀察評定

脈搏檢查法

呼吸肌耐力測定法肌力檢測法200020042008“ThemeGalleryisaDesignDigitalContent&ContentsmalldevelopedbyGuildDesignInc.”“ThemeGalleryisaDesignDigitalContent&ContentsmalldevelopedbyGuildDesignInc.”“ThemeGalleryisaDesignDigitalContent&ContentsmalldevelopedbyGuildDesignInc.”TextinhereDescriptionofthecontentsDescriptionofthecontentsThemeGalleryisaDesignDigitalContent&ContentsmalldevelopedbyGuildDesignInc.ThemeGalleryisaDesignDigitalContent&ContentsmalldevelopedbyGuildDesignInc.TextinhereTextinhere20%40%80%100%120%140%160%200020022004200620082010

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