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Research on lower limbs surface EMG feature of flying lotus kick connecting with knee -lifted balance movement in Tai -chi -chuan
Author(s): 
Pages: 63-67
Year: Issue:  6
Journal: Journal of Shandong Institute of Physical Education and Sports

Keyword:  flying lotus kickknee -lifted balanceEMG research;
Abstract: Lotus kick 360°connecting with knee -lifted balance movement in Tai -chi -chuan is a very important balancing act,which directly affects the success of athletes ranking.A statistic study on all Tai -chi -chuan project ddifficulty error rate of the top 8 athletes in 2006 -2010 National Wushu Championships showed that the lotus kick 360°connecting with knee -lifted balance move-ment failure rate was up to 12.5%,which is the highest of all difficult B class movements.In the highly competitive national contest,the 12.5% error rate is an urgent problem to be solved by all athletes and coaches.This paper employs the methods of literature,expert interview,biomechanical testing and mathematical statistics to test the lower limb surface electromyography of 10 female ath-letes.The results showed that the strength of lower limb muscle activity is closely associated with the
stability of movement and success rate.When thrusting against the ground,the vastus medialis mus-cle excitability is higher,and as the body's center of gravity shifted,the right leg EMG gradually in-creased and when reaching the flight phase,the left leg EMG excitability slowed.The right leg quadriceps is relatively high,and the right rectus femoris iEMG mean (141.17 ±51.96 uV*s)>right vastus medialis (113.78 ±25.02 uV*s)>right vastus lateralis muscle (96.66 ±11. 56uV*s).In landing stage,the left leg EMG excitability continued to decline,keeping knee relax-ed state,while the right leg tibialis anterior muscle achieves the highest mean 932.63 ±436.94 uV*s.Steady success requires action leg relaxation and excitement right leg coordination.

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