Hopper D M, McNair P, Elliott B C
Curtin University of Technology, Perth, Australia.
Br J Sports Med. 1999 Dec;33(6):409-13. doi: 10.1136/bjsm.33.6.409.
To investigate the effect of bracing and taping on selected electromyographic, kinematic, and kinetic variables when landing from a jump.
Fifteen netball players performed a jump, so as to land on their dominant limb on a force plate. Electromyographic activity was recorded from the gastrocnemius, tibialis anterior, and peroneus longus muscles. Subjects were also filmed and measures of rearfoot motion were derived.
Significantly less electromyographic activity (p<0.007) was observed from the gastrocnemius and peroneus longus muscle groups when subjects were braced. No other significant electromyographical findings were observed. Peak vertical ground reaction force and time to peak for vertical ground reaction force were not affected by bracing and taping, nor were the rearfoot and Achilles tendon angles at foot strike.
The effect of bracing and taping on the selected biomechanics variables associated with landing was specifically limited to a reduction in muscle action, particularly for the braced condition. Netball players can be confident that the biomechanics of their landing patterns will not be altered whether they choose to wear a brace or tape their ankle joints.
研究支撑和贴扎对从跳跃落地时选定的肌电图、运动学和动力学变量的影响。
15名无挡板篮球运动员进行一次跳跃,以便用其优势肢体落在测力板上。记录腓肠肌、胫骨前肌和腓骨长肌的肌电活动。对受试者进行拍摄,并得出后足运动的测量结果。
当受试者使用支撑物时,腓肠肌和腓骨长肌组的肌电活动明显减少(p<0.007)。未观察到其他显著的肌电图结果。支撑和贴扎对垂直地面反作用力峰值和垂直地面反作用力达到峰值的时间没有影响,在脚着地时后足和跟腱角度也未受影响。
支撑和贴扎对与落地相关的选定生物力学变量的影响具体仅限于肌肉活动的减少,特别是在使用支撑物的情况下。无挡板篮球运动员可以放心,无论他们选择佩戴支撑物还是对踝关节进行贴扎,其落地模式的生物力学都不会改变。