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- W2527364852 abstract "Short-leg walking boots are a popular alternative to traditional casting in the treatment of acute foot injuries and offer many advantages over traditional casting. While the changes in kinematic and kinetic patterns when walking in short-leg walking boots have been examined, few studies have examined the neuromuscular responses to short-leg walking boots. PURPOSE: To examine the alterations in muscle activation patterns in response to two different short-leg walking boots during level walking. METHODS: Eleven subjects (27.4 ± 7.8 yrs) performed five level walking trials in a pair of lab shoes and two walkers, Intuition and Equalizer. An electromyography (EMG) system, a force platform, and a 6-camera motion analysis system were used to collect surface EMG, ground reaction forces and 3D kinematics. Onsets and durations of the Tibialis Anterior (TA), Peroneus Longus (PL) and Medial Gastrocnemius (MG) were determined relative to the heel strike and presented as a percent of the stance duration. A 4 x 3 (Muscle x Condition) two-way repeated measures ANOVA was used to evaluate EMG variables with post hoc comparisons where an alpha level (p <0.05) was adjusted for multiple comparisons through a Bonferroni procedure. RESULTS: During the gait cycle, a bimodal activation pattern was observed for TA and a unimodal activation pattern was seen for PL and MG. The onset data, during the load response, showed that the TA activated significantly earlier in Intuition (6%) and in Equalizer (4%) than in the shoe condition. Both PL and MG also activated earlier in Intuition (27% and 25%) and Equalizer (5% and 20%) than in the shoe condition. During the pre-swing, TA had an earlier onset (8%) in both walker conditions compared to the shoe condition. The duration data showed that TA was active 28% (Intuition) and 21 % (Equalizer) longer than in shoe walking. PL was shown to have a significantly longer duration of activation in Intuition than in the shoe condition while MG was active longer in both walkers than in shoe walking. During the pre-swing, TA had longer activation (14% in Intuition and 13% in Equalizer) than in the shoe condition. In addition, the comparisons showed that the Intuition had longer activation durations for all muscles than Equalizer. CONCLUSION: The findings suggested that the walking boots altered the muscle activities of lower extremity by activating these muscles earlier and for longer period of time. The Intuition walker caused longer muscle activations but maintained similar onsets for the muscles during walking." @default.
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- W2527364852 date "2006-05-01" @default.
- W2527364852 modified "2023-10-18" @default.
- W2527364852 title "Short-leg Walking Boots Alter Muscle Activation Patterns during Level Walking" @default.
- W2527364852 doi "https://doi.org/10.1249/00005768-200605001-02002" @default.
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