| (Physical Education College of Suzhou University,Suzhou 215021,China) Abstract: This study applies dynamic isokinetic to make a research on relation between sEMG's mean frequency (MF) and blood lactate content with different loads as 10%,30% and 50%MVC on triceps muscle, biceps muscle, and brachioradialis muscle. MF and blood lactate were used as parameters for a comparative analysis. The results indicated that:(1)During flexion and extension of elbow joint, peak torque descended more dramatically in course of extension than in flexion. (2)30% and 50% MVC witnessed a step-by-step dissension in MF, and a step-by-step ascension of blood lactate content. MF's dissension extent for working muscles tapered off as triceps muscle, biceps muscle, and brachioradialis muscle.(3)The comparative analysis indicated that changes of MF and changes of blood lactate content have correlated with each other significantly in 10%, 30% and 50%MVC. Thus,results of the research revealed that sEMG could play a specific and noninjurious role in examination, directly reflecting motion of muscles, and correlating with metabolic changes in muscle tissues as well.
Key words: sEMG; mean frequency; blood lactate |
