Effects Of Foam Rolling And Static Stretching On Popliteal Artery Hemodynamics After Lower Extremity Fatigue

Objective: Foam roller and static stretching are the commonly used means of recovery for exercise-induced muscle fatigue.By comparing the indexes of hemodynamics of popliteal artery after fatigue and static traction,we observed the changes of local blood circulation and subjective fatigue(RPE),and explored the effects and differences between foam axis and static stretching on the recovery of exercise induced muscle fatigue.The possible mechanism of the effect is also discussed,which provides theoretical basis and method guidance for the practical application of foam shaft and static tension.Methods: Methods: 20 healthy male college students aged 18-25 were recruited from Chengdu Institute of physical education.The experiment was divided into four groups: stretching group,foam shaft group and rest group according to the intervention method.Each subject repeated three different intervention experiments with an interval of one week.All subjects performed three times of exhaustive exercise on a power bicycle to induce lower limb muscle fatigue;During the recovery process,static tension,foam shaft rolling and active rest were used to intervene.The intervention sites were bilateral gluteus maximus,hamstring,quadriceps femoris and triceps crus.In the foam axis group,under the condition of self weight,the muscles were rolled by the foam shaft.The static stretching group intervened the muscle by passive static stretching.The muscles of each part were operated 1min,and the interval between groups was 2min,a total of 10 min.The subjects in the rest group sat and rested for 10 minutes.The heart rate was measured during the experiment.The popliteal artery blood pressure,brachial artery blood pressure,heart rate,popliteal artery blood flow velocity(PSV),vessel diameter and peripheral resistance(RI)of the left lower limb were measured before and immediately after exercise,0 min,15 min and 30 min after intervention.Use spss26 0software analyzes all data.Results: 1.Subjective fatigue feeling(RPE): there was no significant difference among the three groups at three times after the intervention.2.Popliteal artery peak systolic blood velocity(PSV): PSV increased during exercise.After intervention,PSV decreased in all three groups.When 0min is used,the PSV of the foam shaft group is the fastest,and the static tension and rest speed are close.At 15-30 min,PSV in the rest group increased gradually;The static tension group and the foam axis group continued to decline,lower than the rest group.Vessel diameter: after the intervention,it first increased and then decreased.There was no significant difference among the three intervention methods.Peripheral resistance(RI): there was no significant change in RI after three ways of intervention.3.Heart rate(HR): HR increases during exercise and decreases gradually after intervention.At 0-15 min,the heart rate of foam axis and static tension was lower than rest,and there was significant difference between the two groups and rest group.At 30 min,there was no significant difference in heart rate among the three groups.4.Popliteal artery systolic pressure: increased during exercise;After intervention,it decreased first and then increased.The descending speed of the three groups was: rest group > stretching group > foam shaft group.At 0 min,there was a significant difference among the three groups.At 15 min,there was a significant difference between the foam group and the rest group.At 30 min,there was no significant difference among the three groups.Brachial artery systolic pressure:increased during exercise;After intervention,all three groups decreased.At 0min,there was a significant difference between the foam axis group and the rest group.At other times,there was no significant difference between the groups.Mean arterial pressure: at0 min,there was a significant difference between the foam axis group and the rest group.There was no significant difference in other moments among the three groups.Popliteal artery diastolic pressure: decreased during exercise;After the intervention,the three groups decreased first and then increased.At 0min,there is a significant difference between foam shaft and static tension.There was no significant difference at other times in each group.Brachial artery diastolic pressure: decreased during exercise and increased after intervention.There was no significant difference among the three groups at all times.Conclusion:1.After one exhausting exercise,the static tension and foam shaft were used to relax and restore.There was no significant difference in subjective fatigue between the two ways,but all were better than rest.2.After one exhaustive exercise,there was no difference in popliteal artery diameter and peripheral resistance after the three intervention methods.It is suggested that using static tension and foam shaft to relax after exercise will not influence the structure of the blood vessel itself.3.After a exhaustive exercise,foam axis and static stretching can increase the local blood supply of popliteal artery,promote the recovery of fatigue after exercise,and the improvement of local blood circulation of popliteal artery by static tension is greater than that of foam axis.However,with the recovery of fatigue after exercise,the effect gradually weakened.