Effects of hamstring stretching on back pain and flexibility

The purpose of this study is to verify how hamstring threading affects flexibility and back pain in 14 patients suffering from chronic back pain. Stretching exercise was conducted for 8 weeks from September 2020 using surrounding objects at each work site in consideration of the situation where group exercise due to COVID-19 was not possible. The exercise method consisted of three stages from low-level stretching to intermediate-level stretching and high-level stretching, and the exercise time was performed once per hour (repeated 3-5 times of steps 1, 2, and 3) at work. Prior to the experiment, 14 subjects were pre-tested and post-test was performed after the program was applied. The results of the effect of hamstring stretching on flexibility and back pain are shown in Table. Same as 3. There was no statistically significant difference in the change in flexibility before and after the experiment measured in this study, but there was a difference of more than 1 CM from the average of 8.15 CM before to 9.49 CM after the experiment. This is the result shown in a short period of 8 weeks, and it is judged that it is necessary to verify more in-depth results through long-term follow-up studies. In the results of the change in back pain, there was a statistically significant difference in the change in back pain (p<.01) before and after the experiment. This result is that the hamstring shortened due to poor posture and sitting in a chair for a long time causes back pain, and stretching the shortened hamstring has a positive effect on back pain. In addition, there are previous studies showing that shortened hamstrings adversely affect not only back pain, but also muscles around the hips, pelvis, etc. Currently, the number one mortality rate among the elderly over 80 is falling. Back pain has a direct correlation with gait, and in this study, the subjects were l imited to office workers in their 20s and 30s, but it is expected that more effective and clear pain improvement measures can be suggested through research by age group in the future.