| Abstrakt: |
This study assessed how sex of participant is related to electromechanical delay during a karate punch. Ten male (Mage = 25.00 yr., SD= 3.02; Mheight= 174.9 cm, SD= 6.3; Mweight = 71.13 kg, SD= 9.35) and 8 female (Mage = 27.4 yr., SD= 6.0; Mheight = 161.4 cm, SD= 5.1; Mweight = 59.09 kg, SD= 7.00) karate athletes performed 10 ballistic punches to a target as hard as possible. Kinematic analysis and surface electromyographic (EMG) activity of the upper-limb muscles were recorded. Men had a significantly shorter electromechanical delay in the anterior portion of the deltoid, showing a larger effectiveness in the transfer of the contractile force for the beginning of movement. Agonist and antagonist relationships show intermuscular coordination differences between the sexes. Results revealed the existence of a different neuromuscular coordination pattern of motor control between men and women, although a similar kinematic pattern was expected due to karate practice. |
