This study is an experimental research. Two groups measured before and after treatment. The objective was to study the effect of stretching the muscles with the recognition of risk factors, ergonomics, work to strengthen lower back muscles, reduce pain, neck pain and lower back. The sample group consisted of professional sewing Phrae female sample size of 60 set by the ratio hypothesis formulated. Segmentation by simple random experimental group and a control group of 30 samples, which have similar demographic characteristics. The experimental group received a program of stretching the muscles for eight weeks with a recognized risk factor for ergonomics. The control group received the knowledge of ergonomic risk factors alone. Comparison between groups by using Independent t-test within the statistical Paired t-test
results showed that 1) after the program groups are the strength of the back muscles than the control group was statistically significant (. p - value = .042) 2) after the program. The experimental group with neck pain did not differ from the control group was statistically significant (p - value = .650) 3) After receiving the application, the experimental group had lower back pain than the control group significantly. Statistics (p - value = .001) 4) after the program groups with mean scores of the strength of the muscle after rather than before the trial was statistically significant (p - value = 0.006) 5) after the program. The experimental group had a mean score of neck pain than before the experiment at a statistically significant (p - value = 0.001) 6) After receiving the application, the experimental group had a mean score of pain in the lower back less than previous experiments. A statistically significant (p - value = 0.001) 7) after the program control group had mean scores of pain, lower back pain, neck pain, lower back no different to previous trials with statistically significant. (p - value = 0.108, p - value = 0.073, p - value = 0.573), respectively,
the results of this research show that the program of stretching the muscle with perceived risks ergonomics of work. improves muscle strength. Reduce pain, muscle aches, neck and lower back. So should encourage activity stretching muscles regularly in the work. To be able to work better.
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