力竭性运动锻炼和饥饿对南方鲇运动后过量耗氧的影响(英文)
THE EFFECT OF EXHAUSTIVE EXERCISE TRAINING AND FASTING ON POST2EXERCISE OXYGEN CONSUMPTION RATE IN SOUTHERN CATFISH ( SILURUS MERID IONAL IS CHEN)
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摘要: 为了检验力竭性运动锻炼和饥饿是否对南方鲇Silurus meridonalisChen维持能量消耗和无氧代谢能力产生影响,在25℃条件下测定了维持日粮(1.5%body mass per day)和饥饿条件下南方鲇15d力竭性锻炼(5min chasing)和随后5d恢复过程静止代谢率(VO2rest)和运动后过量耗氧(Excess post-exerciseVO2,EPOC)的变化。另外两组非锻炼组分别作为摄食和饥饿对照组。实验过程中摄食和饥饿对照组VO2rest显著下降(P0.05),而摄食和饥饿对照组经过15d的锻炼显著上升(P0.05)。经过5d的恢复2锻炼组VO2rest显著下降与对照组无显著差异。摄食和饥饿对照组力竭运动后代谢率峰值(VO2peak)在实验过程中显著下降(P0.05),而摄食和饥饿锻炼组经过15d没有显著变化。锻炼取消后2锻炼组VO2peak显著下降至对照组水平。各锻炼组和对照组间过量耗氧均无显著差异。实验提示:(1)锻炼导致VO2rest和VO2peak显著提高,但影响可塑性大,5d恢复期后影响消失;(2)锻炼导致力竭运动后代谢恢复速率加快,5d恢复期后锻炼影响依然存在;(3)对饥饿和摄食组,锻炼的生理影响相似,但饥饿组VO2rest对锻炼更为敏感。
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关键词:
- 运动后过量耗氧(EPOC) /
- 力竭性运动锻炼 /
- 静止代谢率 /
- 南方鲇
Abstract: To testwhether training and fasting have significant effects on maintenance energy expenditure and anaerobic me-abolism,the resting oxygen consump tion rate (VO-rest ) and post-exercise VO-(EPOC) in southern catfish (S ilurusm eridi-nalis Chen) fed on maintenance rations (1. 5% body mass per day) or fasted during 15d of exhaustive exercise training5 min chasing) and a subsequent 5d without trainingwas investigated at -5℃. Two group s kep t under the same conditionsithout exercise training acted as feeding and fasting controls. The VO-rest values of both feeding and fasting controls de-reased significantly during the experiment (P < 0. 05),while those of the feeding and fasting training group swere signifi-antly increased after 15d of training (P < 0. 05). VO-rest of both training group s decreased significantly to control levels af-er training was stopped. The VO-peak values of both feeding and fasting controls decreased significantly during the experi-ent (P < 0. 05),while those of the feeding and fasting training group s were unchanged after 15d of training. VO-peak ofoth training group s decreased significantly to control levels after trainingwas stopped. There were no significant differencesn excess post-exercise VO- (EPOC) between any training and control group s. It is suggested that: (1) VO-rest and VO-peakere significantly improved by exercise training compared with the control group s,but returned to their previous values 5dfter stopp ing training; (-) post-exercise VO- recovered faster in training group s compared with control group s,and thisrait persisted 5d after stopp ing training; (3) training had similar physiological effects on feeding and fasting southern cat-ish,excep t that VO-rest wasmore sensitive to training in the fasting group. -
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