间歇低氧运动对肥胖大鼠食欲影响及其机制研究摘要:探讨间歇低氧运动对营养性肥胖SD大鼠摄食的影响并分析其可能机制,为间歇低氧减肥提供理论依据。为此,通过对雄性SD大鼠饲喂高脂饲料建立营养性肥胖模型,然后进行为期4周的间歇低氧运动(运动速度为20m/min,(02)前2周为15.4°/。,后2周为14.5°/。)。间歇低氧运动组进行4周间歇低氧运动刺激。结果发现:与常氧安静组相比,常氧运动组和间歇低氧运动组肥胖SD大鼠下丘脑瘦素和瘦素受体含量增加(常氧运动组P<0.05,间歇低氧运动组P〈0.01),大鼠的每日摄食量减少。与常氧运动组相比,间歇低氧运动组肥胖SD大鼠下丘脑瘦素和瘦素受体含量增加(瘦素P<0.05,瘦素受体P<0.01)o结果说明:1)间歇低氧运动抑制了肥胖大鼠的食欲,减少了摄食量,减缓了大鼠体重的增加,并且间歇低氧效果比单纯运动效果好;2)间歇低氧运动抑制大鼠食欲可能与大鼠下丘脑瘦素和瘦素受体含量增加,进而抑制神经肽Y有关。关键词:运动生物化学;食欲;间歇低氧运动;肥胖大鼠分类号:G804.7文献标识码:A文章编号:1006-7116(2011)04-0133-04AnalysisoftheeffectofintermittenthypoxicexercisingontheappetiteofobeseratsanditsmechanismCHENYu-wenl,LINWen-tao2,QIULie-feng3,WENGXi-quanl(1.SchoolofSportsandLeisure,GuangdongOceanUnivesity,Zhanjiang524088,China;2.ProvincialKeyLaboratoryofBiochemistry,GuangzhouSportUniversity,Guangzhou510075,China;3.SchoolofPhysicalEducation,XinyangNormalUniversity,Xinyang464000,China)Abstract:TheauthorsprobedintotheeffectofintermittenthypoxicexercisingontheingestionofnutritionalobeseSDrats,soastoprovideatheoreticalcriterionforweightreductionthroughintermittenthypoxicexercising.Hence,theauthorsestablishedanutritionalobesitymodelforfeedingmaleSDratswithhighfatfeed,thenlettheratsintheintermittenthypoxicexercisinggroupdoa4~weekintermittenthypoxicexercise(exercisingspeed:20m/min,(02):15.4%inthefirsttwoweeks,14.5%inthelasttwoweeks),andrevealedthefollowingfindings:ascomparedwiththeratsinthenormoxiccalmgroup,thecontentsofhypothalamusleptinsandleptinreceptorsofobeseSDratsinthenormoxicexercisinggroupandintermittenthypoxicexercisinggroupincreased(theratsinthenormoxicexercisinggroup:P<0.05,theratsintheintermittenthypoxicexercisinggroup:P<0.01),andthedailyingestionoftheratsdecreased;ascomparedwiththeratsinthenormoxicexercisinggroup,thecontentsofhypothalamusleptinsandleptinreceptorsofobeseSDratsintheintermittenthypoxicexercisinggroupincreased(leptins:P<0.05,leptinreceptors:P<0.01).Thefindingsindicatedthefollowings:1)intermittenthypoxicexercisingrestrainedtheappetiteofobeserats,reducedtheiringestion,andsloweddowntheincreaseoftheirweight;theeffectofintermittenthypoxicexercisingwasbetterthantheeffectofsimpleexercising;2)intermittenthypoxicexercisingrestrainingtheappetiteoftheratsmayberelatedtotherestrainingofneuropeptideYasaresultoftheincreaseofthecontentsofhypothalamusleptinsandleptinreceptorsoftherats.Keywords:exercisebiochemistry;appetite;intermittenthypoxicexercising;obeserat随着生活水平的不断提高和生活方式的改变,肥胖的发生率越来越高。肥胖常会导致许多疾病的发生,影响身体健康及寿命,如今已成为危害公众健康的重要因素之一。因此,寻找预防和治疗肥胖的有效方法成为医学界亟待解决的问题。肥胖是由特定的生化因子引起的一系列进食调控和能量代谢紊乱的疾病。在我们以往的低氧运动实验中,发现大鼠在低氧环境下运动时摄食减少、体重下降、体脂降低。本研究试图通过研究间歇低氧运动对肥胖SD大鼠摄食因子的影响,来分析间歇低氧运动减少摄食、降低体重的机制,进而为低氧运动减控体重提供理论依据。1实验对象与方法1.1实验对象实验对象为7...