PNF and Movement 2019; 17(3): 379-389
https://doi.org/10.21598/JKPNFA.2019.17.3.379
The Effect of Various Wheelchair Handle Directions on Muscle Activity of Adult Male Trunks When Climbing Ramps
Su-Hong Ahn, P.T., M.S.⋅Su-Kyong Lee, P.T., Ph.D1†
Department of Biomedical Health Science, Graduate School, Dong-Eui University
1Department of Physical Therapy, College of Nersing and Healthcare Sciences, Dong-Eui University
Correspondence to: Su -Kyong Lee (ptlsk@deu.ac.kr)
Received: July 15, 2019; Revised: August 21, 2019; Accepted: August 22, 2019; Published online: December 31, 2019.
© Korea Proprioceptive Neuromuscular Facilitation Association. All rights reserved.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Purpose: This study examined the effects of wheelchair handle directions on the trunk muscle activity of adult males when climbing ramps. It also evaluated the wheelchair attendant’s physical discomfort during tasks.
Methods: Healthy males aged over 20 years were chosen and the direction of wheelchair handle grip was randomly selected. The grips included a general grip with ulnar deviation, a medial grip with wrist pronation, and a neutral grip with a neutral wrist. The trunk muscle activity was measured using surface electromyography. Furthermore, the physical discomfort of wheelchair attendants was subjectively evaluated using the Borg CR-10 Scale, which rates the perceived exertion. In addition, the SPSS 18.0 program was used perform repeated measure ANOVA to compare muscle activity and subjective discomfort during the interventions. The contrast test was also conducted with a significance level (α) of 0.05.
Results: There was significant difference between the general grip and the medial grip in the rhomboid major muscle and the lumbar erector spinae muscle (p<0.05). In addition, there was significant difference between the general grip and the neutral grip in the rhomboid major muscle and the lumbar erector spinae muscle (p<0.05). Further, there was significant difference between the general grip and the neutral grip in subjective discomfort (p<0.05).
Conclusion: In this study, adult male trunk muscle activity and subjective discomfort were lowest when using the neutral grip while climbing ramps. Accordingly, we suggest that neutral grips will help improve the function of the musculoskeletal system and reduce the subjective discomfort by putting less strain on the trunk muscles and maximizing efficiency with less force.
Keywords: Wheelchair, Ramp, Handle grip direction, Muscle activity


This Article

e-submission

Archives