The Study Of The Effect Of Different Modes Of Water Bath Therapy On Fatigue Recovery Of College Students After Power Cycling

Objective: To explore the effectiveness and differences of four different modes of cold water immersion,hot water immersion,contrast water therapy,and passive recovery to alleviate college students' fatigue after power cycling,in order to provide a reference for choosing an appropriate fatigue recovery method after exercise..Methods: Sixty male non-sports male college students who meet the experimental conditions were randomly divided into four groups: cold water immersion group,hot water immersion group,cold and hot water immersion group,and passive recovery group,each with 15 people.The subjects all performed increasing load power cycling to exhaustion,and then took cold water immersion(15?,14min),hot water immersion(38?,14min),cold and hot water alternate bath(38?,1min+15?,1min,7cycles),passive recovery(sit and rest for 14min)four different recovery methods,exercise fatigue indicators were measured before exercise,after exercise and immediately after recovery.The test indicators include: heart rate,subjective fatigue,and physiological and biochemical indicators that characterize fatigue recovery,blood oxygen saturation,blood flow perfusion index,and blood lactate;muscle soreness and muscle electromyography(iEMG).)And mean power frequency(MPF),cognitive function indicators that characterize central response,event-related potential P2 latency and amplitude,behavioral data response time,and accuracy.Spss20.0 was used for statistical analysis.Results: 1.The fatigue level indicators before exercise,after exercise,and after recovery are as follows: the heart rate and subjective feeling fatigue of each group before exercise are at the same quiet level,and the heart rate and subjective feeling fatigue are significantly increased after exercise.High,reaching exhaustion.After the intervention of different recovery methods,the cold water immersion and the contrast water therapy can promote the recovery of subjective feeling fatigue,and the effect is better than the passive recovery(P<0.05).Between the cold water immersion group and the cold and hot water immersion group,the hot water immersion and There were no significant differences in other groups(P>0.05).Both cold water immersion and contrast water therapy can promote heart rate recovery,and the effect is better than passive restoration and hot water immersion(P<0.05).No significant difference(P>0.05).2.The changes in physiological and biochemical indicators that characterize the fatigue recovery process before and after exercise and during the recovery period are that there is no statistical difference in blood oxygen saturation,blood flow perfusion index,and blood lactate among the groups before exercise.Flow perfusion index and blood lactate increased.After 14 minutes of recovery,blood oxygen saturation increased,and blood flow perfusion index and blood lactate concentration decreased.The blood oxygen saturation increased the most in the cold water immersion group,which was close to the level before exercise,but there was no significant difference between the groups(P>0.05).The cold water immersion promoted the recovery of blood flow perfusion index,and the effect was better than passive recovery(P<0.05),there was no significant difference between the hot water immersion group and the contrast water therapy group and each group(P>0.05);while the hot water immersion and the contrast water therapy can improve the blood lactate clearance rate after fatigue,the effect Better than passive recovery(P<0.05).The effect of the cold-hot water immersion group was better than the cold-water bath group(P<0.05),but there was no significant difference with the hot-water bath group.There was no statistics between the cold-water bath group and other groups.Differences(P>0.05).3.During peripheral skeletal muscle exercise to fatigue and recovery,muscle soreness and electromyography showed that there was no soreness in the quadriceps of each group before exercise,muscle aches after exercise,and muscle soreness after 14 minutes of intervention Alleviation,hot water immersion,cold water immersion and alternating contrast water therapys all help to reduce muscle soreness(P<0.05),of which cold water immersion has the best effect,which is significantly different from hot water immersion group(P<0.05).There was no statistical difference between the cold and hot water immersions and the other two groups(P>0.05).There was no significant difference in iEMG and MPF of the four groups before exercise,and both decreased after exercise.After intervention,the cold water immersion group and the contrast water therapy group promoted iEMG recovery,and the effect was better than the passive recovery group(P<0.05).The cold water immersion Group and the contrast water therapy group,the hot water immersion group and other groups were not statistically different(P>0.05);MPF recovered after intervention in the cold water immersion,cold and hot water immersion and hot water immersion,the effect was better than passive Recovery(P<0.05),no significant difference between the three groups(P>0.05).4.The changes in the 2-back cognitive task indicators that characterize the centralresponse in the three phases before exercise,after exhaustive exercise,and after fatigue recovery are: no significant differences in response time,accuracy,P2 amplitude,and latency between the four groups before exercise After the exercise,the reaction time decreases,the accuracy rate increases,the amplitude increases,and the latency is shortened.Compared with before the exercise,the cognitive function is improved(P<0.05).After the intervention,the cold water immersion and the alternating contrast water therapy promote the reaction time and the accuracy rate to return to The level before exercise was faster than the hot water immersion and passive recovery,but there was no significant difference in each group(P>0.05);the hot water immersion,cold water immersion,and alternating contrast water therapys accelerated the recovery of the incubation period,but there was no significant difference(P>0.05);the cold water immersion group and the contrast water therapy group promoted the P2 amplitude to return to the level before exercise,and the effect was better than the passive recovery(P<0.05);the cold water immersion group and the cold and hot water immersion group,and the hot water immersion group There was no statistical difference with other groups(P>0.05).Conclusions: All hydrotherapy can promote the recovery of sports fatigue,among which CWT is the best.2.CWT not only accelerates the clearance of blood lactic acid,but also helps restore muscle function,it can also effectively relax the body and mind,reduce subjective fatigue,and promote cognitive function to return to pre-exercise levels.