Abstract
Introduction
Comprehensive insights into muscle strength and proprioception of children with hearing or visual impairments in comparison with individuals with typical development are yet to be achieved in literature. The purpose of this study was to investigate the proprioception and lower limb strength of children with hearing or visual impairments compared to those without disabilities (comparison).
Methods
This study featured a cross-sectional design with participants (N = 45) placed within one of three equally stratified purposive groups (hearing impaired, visually impaired, or comparison) within the age range of 9–13 years (Mean = 11.43, SD = 1.5). Joint angle-reposition test was used to measure proprioception and the Manual Muscle Testing (MMT) was used to measure the strength of the lower limb muscles.
Results
The results indicated that knee joint position sense error was greater for the comparison group in standing (p = .02) and sitting positions (p = .03) than those with hearing or visual impairments (p = .001). It was also greater for comparison in the dorsiflexion (p = .03) and plantarflexion (p = .03) than those with hearing or visual impairments (p = .001). Moreover, the results showed that the lower limb muscle strength of subjects with visual impairments was weaker than those with hearing impairments (p = .03), as well as with the comparison group (p = .001), although no significant difference was found between the lower limb strength of the hearing impaired and comparison groups (p>.05).
Discussion
The results demonstrated that the proprioception of children with hearing and visual impairments was significantly better than that of comparison. Furthermore, the muscle strength of children with visual impairments was significantly weaker than that of children with hearing impairments and comparison.
Implications for Practitioners
It is recommended that progressive physical activity programs be used to develop muscular strength of children with visual impairments.
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