Experimental Study On The Influence Of Different Pressure And Blood Flow Restriction Training On Upper Limb Strength Of Male College Students

Objective: Objective: To design and implement a 6-week intervention experiment to explore the influence of blood flow restriction training(BFRT)under different pressures(low pressure 100 mm Hg,medium pressure 140 mm Hg,high pressure180 mm Hg)on the upper limb strength of male college students,and compare the influence degree of each pressure,so as to find out which pressure blood flow restriction training is more suitable for this group.To provide exercise prescription for male college students to exercise upper limb strength,and to accumulate certain theoretical and experimental data basis for the related research on the dose-effect relationship between blood flow restriction training pressure value and training effect.Methods: On the basis of literature review and pre-experiment,16 ordinary boys from East China Normal University were randomly divided into 4 groups(4 in each group).The blood flow restriction training under the pressure of no pressure above the biceps brachii(blank group),100 mm Hg(low pressure group),140 mm Hg(medium pressure group)and 180 mm Hg(high pressure group)was carried out respectively,and the training was carried out three times a week in combination with barbell bench press,barbell bending and dumbbell neck back arm flexion and extension with 30%1RM load intensity.Before and after the experiment,the data of upper limb muscle morphology(arm circumference,chest circumference,muscle content of both arms)and upper limb motor performance(elbow joint peak torque,parallel bars 1RM)were tested,and the changes of upper limb muscle morphology and motor performance before and after training were compared by "paired sample T test" of mathematical statistics,and the changes between groups were compared by "one-way analysis of variance".Results: After six weeks of training intervention,there were no significant changes in the arm circumference,chest circumference,muscle content of both arms,peak moment of elbow joint and 1RM of parallel bars in the blank group and the lowpressure group(P > 0.05),but there were significant changes in all test indexes of muscle shape and upper-limb performance in the medium-pressure group and the highpressure group(P < 0.05).The change degree of high voltage group is significantly higher than that of low and medium voltage resistance(P < 0.05).Conclusion: 1.Compared with non-pressurized low-load resistance training(blank group),blood flow restriction training can produce different degrees of gain effect on male college students’ upper limb strength.2.Low-pressure BFRT has a certain degree of gain in upper limb performance,but it has no statistically significant change in upper limb muscle morphology;Both medium-pressure BFRT and high-pressure BFRT can produce significant gain effects on upper limb sports performance and muscle morphology.3.The effect of high-pressure BFRT is higher than that of medium-pressure BFRT and low-pressure BFRT in increasing the muscle circumference and muscle content of male college students’ upper limbs and increasing the maximum muscle strength of biceps brachii and triceps brachii.The effect of high-pressure BFRT is equivalent to that of medium-pressure BFRT in increasing the parallel bars by 1RM,and both are higher than that of low-pressure BFRT.4.Considering the safety and cost performance of training,ordinary people should adopt moderate pressure blood flow restriction training to enhance the performance of upper limb muscle strength.