- 著者
- Sangyeol Lee Jemyung Shim Minchull Park
- 出版者
- The Society of Physical Therapy Science
- 雑誌
- Journal of Physical Therapy Science (ISSN:09155287)
- 巻号頁・発行日
- vol.23, no.4, pp.549-551, 2011 (Released:2011-09-22)
- 参考文献数
- 15
- 被引用文献数
- 2 3
[Purpose] This study examined the muscle activation when subjects gripped a handle with a circumference equal to 0%, 25%, 50%, 75%, or 100% of their hand length to determine the size that can be gripped most stably relative to the hand length. [Subjects and Methods] The muscle activation of 34 subjects was measured using electromyography. To make a cylinder proportionate to the hand length, multiple pencils were combined and the circumference was measured with a tape measure. The cylinders were made with circumferences of 0 %, 25 %, 50 %, 75 %, and 100 % of the hand length. [Results] The largest muscle activation was observed at handle circumferences of 50% and 75% of the hand length in the wrist extensor bundle and at 75% of the hand length in the flexor digitorum superficialis. [Conclusion] Therefore, circumferences of the middle range of hand length seems to be most appropriate for hammer handles and handles with high resistance which require large strength at industrial sites.
- 著者
- Jemyung Shim Minchull Park Sangyeol Lee Myounghee Lee Hwanhee Kim
- 出版者
- 理学療法科学学会
- 雑誌
- Journal of Physical Therapy Science (ISSN:09155287)
- 巻号頁・発行日
- vol.22, no.3, pp.227-232, 2010 (Released:2010-09-18)
- 参考文献数
- 18
- 被引用文献数
- 3 5 1
[Purpose] The purpose of this study was to compare the effects of shoulder stabilization exercise and shoulder isometric resistance exercise on maximum voluntary isometric contraction (MVIC) rate of change of shoulder stabilization muscles and hand function. [Method] The subjects of this study were nineteen healthy adults who had no problems with their musculoskeletal system. Group I performed shoulder stabilization exercise with a ball for 30 minutes. Group II performed shoulder isometric resistance exercise without a ball for 30 minutes. Electromyography recorded the MVIC rate of change of the upper trapezius, lower trapezius and serratus anterior in a manual muscle testing position after each exercise. All subjects were assessed for hand function (power and dexterity) using a dynamometer, pinch gauge, grooved pegboard and Purdue pegboard. The EMG data was compared using the independent t-test. Hand function was compared using the independent t-test and the paired t-test. [Results] The results of study were as follows: the MVIC rate of change showed significant difference between the shoulder stabilization exercise group and the shoulder isometric resistance exercise group for the upper trapezius and serratus anterior. In the shoulder stabilization exercise group, power grip, pinch, grooved pegboard test and Purdue pegboard test results were significantly increased post-intervention. In the shoulder isometric resistance exercise group, pinch was significantly increased post-intervention, but the other test results showed no significant differences. [Conclusion] We conclude that shoulder stabilization exercise is more effective than shoulder isometric resistance exercise for shoulder stability and hand function.