| Purpose: In this paper,a combination of recovery methods between high-intensity training was compared among male athletes in the 13-14 years old age group of the Liaoning Provincial Swimming Team to observe and analyze the effects of various combination recovery methods on the recovery effects of the athletes.To study and explore the appropriate recovery means for male athletes in this age group.This paper will provide a theoretical basis and scientific guidance for the recovery content of the interval between high-intensity training and the maintenance of a stable competitive state for athletes.Methods: 12 male athletes in the age group of 13-14 years old from Liaoning Provincial Swimming Team were used as the subjects of the study,and each experimental load was two high-intensity full-power swims,the first one was 200 m and the second one was 100 m,all swam in their preferred stroke.There was a 30-minute interval between two high-intensity loads,with three different combinations of recovery during the interval,as follows:(1)15minutes relaxation swim at 60% of the intensity of the 100 m freestyle personal best and 15 minutes of sitting still.(2)15 minutes relaxation swim at 60% of the intensity of the 100 m freestyle personal best and 15 minutes of pulling.(3)15 minutes of pulling and 15 minutes of sitting still.The monitoring indexes were blood lactate,heart rate,Borg rating of perceived exertion(RPE),and the exercise performance of two loading intensities in each group was recorded.Results: From the recovery results of method I,the heart rate decreased faster,and the recovery heart rate after 30 minutes was lower than the quiet heart rate(quiet: 90±8.86,30minutes: 85.5±10.89),and the percentage of heart rate decrease was 48%±11%,and no significant difference between the two indicators in the other two recovery methods.Blood lactate decreased rapidly,from 11.62±2.42 to 2.77±1.21,close to the quiet blood lactate value,and both 15-minute immediate blood lactate and 30-minute immediate blood lactate showed highly significant difference(P<0.01)from method three,and the percentage of blood lactate decrease and 30-minute mean blood lactate clearance were 75±13 and 30±1,respectively,also showing highly significant difference from method three(P<0.01).The decrease in RPE was15.17±2.41 to 10.17±1.12,which was not different from the other two recovery methods;there was no significant difference in athletic performance between the three groups.From the recovery results of method II,the heart rate decreased from 175.2±14.50 to89.5±11.85,closer to the quiet heart rate of 82.5±4.52,with a percentage decrease in heart rate of 49±7,two indicators that were not significantly different from the other two recovery methods.Blood lactate decreased rapidly,from 10.38±2.23 to 2.60±1.06,which was close to the quiet blood lactate value,and both 15-minute immediate blood lactate and 30-minute immediate blood lactate showed highly significant difference from method three(P<0.01),and the percentage decrease in blood lactate and the mean clearance of 30-minute blood lactate were 74±12 and 26±8,respectively,which also showed highly significant difference from method three(P < 0.01).the decrease in RPE was 15.42 ± 2.78-9.67 ± 1.16,which was not significant difference from any of the other two recovery methods.From the recovery results of method III,the heart rate decreased from 172±17.42 to90.5±12.39,close to the quiet heart rate of 89±9.17,with a percentage decrease in heart rate of 46%±12%,two indicators that were not significantly different from the other two recovery methods.15-minute heart rate was significantly different from the other two recovery methods(P<0.05).Blood lactate decreased more slowly,from 9.67±2.47 to 4.98±1.28,which was more different from the quiet blood lactate value.15-minute immediate blood lactate and30-minute immediate blood lactate both showed highly significant difference from methods I and II(P<0.01),and the percentage decrease in blood lactate and the mean clearance of30-minute blood lactate were 46%±17% and 16%±7%,respectively,the recovery effect was significantly lower than that of methods I and II and showed a highly significant difference from the other two recovery methods(P < 0.01).The decrease in RPE was 15.17 ± 2.66-9.75± 1.82,which was no significant difference from the other two methods.Conclusion:(1)There is no difference in the recovery effect of blood lactate,heart rate and RPE indexes between the two recovery methods of methods I: 15 minutes of 100 m freestyle personal best 60% intensity relaxation swim + 15 minutes of sit and method II: 15 minutes of100 m freestyle personal best 60% intensity relaxation swim + 15 minutes of stretching,and athletes can choose the suitable recovery method and recovery time according to their own situation.(2)After the high intensity swim in training or competition,it is recommended to choose the relaxation swim with medium intensity,which can help athletes accelerate the metabolism of lactic acid to the greatest extent and restore the competitive state.For the time less than 30 minutes during the two high-intensity intervals,the choice of recovery content in the first 15 minutes is more important.(3)During the intervals of high intensity training,the use of pulling and sitting is the least desirable for the recovery of athletes in a short period of time.This is because the relatively static recovery method has a slow effect on blood lactate removal and does not meet the requirement of rapid recovery in a short period of time.Therefore,it is not recommended to use this method for recovery during high intensity intervals.(4)There was no significant difference between the performance of the two high-intensity swims before and after the three recovery modalities.However,the second high-intensity swim performance in mode(1)had six athletes with slightly improved performance compared to the other two combined recovery modes.Although the improvement was minor,it was enough to boost the ranking in the 100 m swimming event.Therefore,mode(1)can be the first choice for recovery between high-intensity training sessions. |
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