The Effect of kinesio tape and lace-up ankle brace on movement after fatiguing plantar flexor muscle in athletes with functional ankle instability (FAI)

  • 李 琬晴

學生論文: Master's Thesis

摘要

Background: Ankle sprain is a prevalent musculoskeletal injury that occurs in athletes and more than 80% of ankle sprains are caused by inversion trauma Ankle sprain commonly occurs in the later period during matches or in prolong training it gives a clue that timing is an important factor to ankle sprain because a constant muscle contraction leads to muscle fatigue It is common for athletes using external ankle support such as ankle brace or kinesio tape in preventing recurrent ankle sprain The effect of external support however combing fatigue condition to evaluate how external support affect movement control and muscle activity is still unknown The purpose of this study was to investigate the immediate changes of kinetics kinematics and EMG parameters after fatiguing plantar flexor muscle in functional ankle instability athletes with or without external support Method: Thirty-three athletes who had CAIT score less than 24 were identified with functional ankle instability (FAI) They were allocated to the control group (n=11) the ankle brace group (n=11) and the kinesio tape group (n=11) The process of the experiment was conducted from pre-fatigue tasks including single-leg lateral drop landing and one-leg jump landing to plantar flexor muscle fatigue protocol and then post-fatigue tasks the same as the pre-fatigue tasks The kinesio tape group applied kinesio tape on tibialis anterior peroneus longus and gastrocnemius and the ankle brace group applied lace-up ankle brace during fatigue protocol and post-fatigue tasks respectively The outcome measures were the joint angle of lower extremity muscle activity the co-contraction index and the kinetic and kinematic variables The Kruskal-Wallis test was performed to test the significance of median of all dependent variables among three groups The post hoc test was then conducted for any group difference Results: In fatigue condition the athletes without external support performed single-leg lateral drop landing (1) had a greater joint motion and; (2) had a decreased peak vertical group reaction force (3) had greater COM range; (4) increased COP range with faster COP velocity After fatigue the athletes with ankle brace performed single-leg lateral drop landing with (1) an extended landing posture and; (2) an increased peak vertical ground reaction force; (3) a decreased muscle activity of gastrocnemius in the post 100ms landing phase In athletes with kinesio tape they had (1) a decreased postural sway; (2) a decreased peak vertical ground reaction force in single-leg lateral drop landing During one-leg jump landing task little difference was found the athletes with external support redistributed joint motion after fatigue; they had a decreased ankle dorsiflexion and had extended joint angle upon knee and hip joint In addition an increased muscle activation of gastrocnemius was found in pre-landing phase Conclusions: Fatigue impaired dynamic postural control and disabled ankle musculature from sufficient force output The application of lace-up ankle brace provided ankle joint stability and less postural sway but the passive constraint put ankle joint to sustain excessive force and inhibited normal muscle activation after landing The use of kinesio tape provided ankle joint a better landing position and dissipated force while it had little support on proximal joints Athletes with ankle instability utilized external support for long-term use additional inter-segmental neuromuscular control and ankle musculature strengthening program would be necessary to prevent secondary injury
獎項日期2016 九月 5
原文English
監督員Cheng-Feng Lin (Supervisor)

引用此文

The Effect of kinesio tape and lace-up ankle brace on movement after fatiguing plantar flexor muscle in athletes with functional ankle instability (FAI)
琬晴, 李. (Author). 2016 九月 5

學生論文: Master's Thesis