Comparing the landing response on ankle sprained basketball player with ankle taping and soft shell ankle brace

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Comparing the landing response on ankle sprained basketball player with ankle taping and soft shell ankle brace

 

Author: Ngai, Chi-wing Gorman
Title: Comparing the landing response on ankle sprained basketball player with ankle taping and soft shell ankle brace
Degree: M.Sc.
Year: 2004
Subject: Hong Kong Polytechnic University -- Dissertations
Basketball players -- Health and hygiene
Ankle -- Wounds and injuries
Department: Dept. of Rehabilitation Sciences
Pages: xi, 119 leaves : col. ill. ; 30 cm
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b1800276
URI: http://theses.lib.polyu.edu.hk/handle/200/3972
Abstract: The purpose this present study was to examine the reliability of the testing protocols on the effect of soft shell ankle brace and ankle taping on the muscular response over hip and ankle joints, as well as the associated impact force during jump-landing of basketball players with history of multiple ankle sprained. We hypothesized that modulation in electromyography response would be observed in the pre-landing and the magnitude of its associated impact force when injured players performing jump-landing with external ankle support. The study was of cross-sectional design. Thirteen male recreational basketball players were recruited from public basketball court. Subjects with age ranged from 25 to 30, and had experienced bilateral ankle sprains at least 3 times to each ankle within 2 years prior to the test were recruited. They were invited to have a series of jump-landing from a 40 cm platform with and without external ankle support. All of them were requested to attend the test again with 1 week apart. In this study, muscular activities of the tibialis anterior, peroneal longus, medial gastrocnemius and tensor fascia latae muscles were investigated. The pre-landing muscle response latencies, the relative integrated electromyography of the 4 tested muscles, the co-contraction index between tibialis anterior and medial gastrocnemius, as well as the associated impact force on landing were measured. Results from this study showed high reproducibility of EMO response latencies over the 4 muscles in both limbs in the 3 tested conditions with ICCs ranged from 0.70 to 0.96. The only exception is the right peroneal longus ( moderate repeatable of ICC=0.63). Moderate reproducibility was observed in the normalized relative IEMG in the ankle brace and taping conditions (ICCs ranged from 0.60-0.87). High repeatability, with ICCs ranged from 0.83 to 0.84, was also found in the co-contraction index during jump-landing in the 3 tested conditions. Regarding the associated impact force, good reproducibility in the 3 tested conditions were also indicated (ICCs=0.75- 0.96). Significant modulation in the TA and TFL EMG response latencies were observed when the subjects prepared for landing with external supports. A delayed response onset in the tibialis anterior muscle, and an earlier onset in the tensor fasica latae were detected when subjects prepared for landing with the application of external ankle support (with both soft shell brace and the tape) No difference in the response latencies between bracing and taping were detected in the 4 tested muscles when landing. Although statistically insignificant, there was decreasing trend of the relative IEMG in the bracing and taping conditions, and also a decreasing trend in the co-contraction index comparing to no support. In addition, a tendency of increasing impact landing force, even though statistical insignificant, was also demonstrated in both ankle bracing and taping conditions. We suggested that subjects with multiple ankle sprained used a different jump-landing strategy, i.e. a significant delayed response latencies in the TA muscle, and a significant earlier response in the TFL muscles. When ankle taping and brace were applied, there was a decrease in the co-contraction of the dorsiflexor and plantar flexor. The associated impact force demonstrated a trend of increasing, but not statistically significant, after putting on external ankle support.

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