PNF and Movement

Korea Proprioceptive Neuromuscular Facilitation Association (대한고유수용성신경근촉진법학회)
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The Effects of Various Directions of Handle Grip on the Upper Limb Muscle Activity of Wheelchair Attendants during Ramp Climbing

  • Ahn, Su-Hong (Department of Biomedical Health Science, Dong-Eui University) ;
  • Lee, Su-Kyoung (Department of Physical Therapy, College of Nersing and Healthcare Sciences, Dong-Eui University)
  • Received : 2018.09.27
  • Accepted : 2018.10.17
  • Published : 2018.12.31
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Abstract

Purpose: This study aimed to determine the effects of various wheelchair handling directions on the upper limb muscle activities of wheelchair attendants while climbing a ramp. Methods: For the study participants, healthy males over 20 years of age were chosen, and the order of the direction of wheelchair handle grip was determined using a randomized method. The handling directions for pushing the wheelchair up a ramp included a general grip with ulnar deviation, a medial grip with wrist pronation, and a neutral grip with a neutral wrist. The muscle activities in the participants' upper limbs were measured using surface electromyography. For statistical data processing, SPSS 18.0 was used to perform repeated measures ANOVA in order to compare the muscle activity among the intervention groups. A contrast test was also conducted among the participants. The significance level (${\alpha}$) was set to 0.05. Results: There was a significant difference between groups using a general grip and a medial grip in the biceps brachii, triceps brachii, and flexor carpi radialis muscles (p<0.05). There was also a significant difference between using a general grip and a neutral grip in the biceps brachii and flexor carpi radialis muscles (p<0.05), and there was a significant difference between using a medial grip and a neutral grip in the biceps brachii and extensor carpi radialis brevis muscles (p<0.05). Conclusion: In this study, the wheelchair assistants' wrist muscle activity was the lowest with a neutral grip while ascending a ramp. Accordingly, this study proposes that wheelchair assistants push wheelchairs up ramps with a neutral grip.

Keywords

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Fig. 1. Ramp design.

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Fig. 2. Wheelchair handle grip.

Table 1. General characteristics of subjects

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Table 2. Comparison of muscle activity of the wheelchair grip direction during ramp climbing

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Table 3. Comparison of muscle activity of the biceps brachii muscle among the interventions

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Table 4. Comparison of muscle activity of the triceps brachii muscle among the interventions

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Table 5. Comparison of muscle activity of the flexor carpi radialis muscle among the interventions

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Table 6. Comparison of muscle activity of the extensor carpi radialis brevis muscle among the interventions

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