The effect of long-term use of lumbar brace on electromyography activities of lower limb muscles during walking in older adults with low back pain and pronated foot

Jafarnezhadgero, AmirAli The effect of long-term use of lumbar brace on electromyography activities of lower limb muscles during walking in older adults with low back pain and pronated foot. University of Mohaghegh Ardabili.

Text دکتر امیرعلی حعفرنژادگرو- گزارش نهایی طرح کمردرد (1).pdf Download (932kB)

Abstract

Background & Purpose: Lumbar back pain is a complex disease that occurs between the lumbar vertebrae and the sacral vertebrae and is affected by factors that often occur when trying to perform a particular operation or collision. The purpose of this study was to investigate the effects of long-term lumbar brace on the electromyography activities of lower limb muscles during walking in low back pain older adalts with pronated foot. Methodology: This research was of a semi-experimental and a laboratory type. 15 low back pain patients with pronated feet was selected as an experimental group (age: 68.3 ± 2.7 years) and 15 low back pain patients with pronated feet was selected as a control group (age: 69.0 ± 3.9 years). The lumbar buckle used in this research was Sacro Lumbar Support, the BB-OPPO 2065 model, and Taiwan's manufacturing. The electrical activity of the lower limb and trunk muscles was recorded by the electromyography system during walking activity in both pre and post-test. Independent sample t-test was used for statistical analysis. A wireless electromyography system with 9 pairs of bipolar surface electrodes used to record the electromyography activity of back and lower limb muscles (sample rate: 2000 Hz). Alpha level was set at p<0.05. Results: The findings in the experimental group demonstrated that the frequency content of the gastrocnemius medialis muscle during post-test was significantly lower than that during the pre-test (P=0.002). Also, two external oblique (P = 0.007) and rectus abdominus (P = 0.000) muscles showed a significant increase in their frequency content during post-test than that in the test pre-test. The findings of the present study showed a significant increase in the intensity of mean amplitude of electrical activity of the internal gastrocnemius muscle at 13.30% during the experimental group test (p = 0.022, d= 0.42). Also, the mean amplitude of electrical activity of biceps femoris muscle showed a significant increase of 29.67% during the post-test compared to the pre-test (P = 0.003, d = 1.75). The mean amplitude of electrical activity abdominal external oblique muscle also showed a significant decrease of 10.79% during post-test and post-test comparisons (P = 0.005, d = 0.52). In addition, a significant reduction in the mean amplitude of electrical activity of rectus abdominis muscle was also 12.69% during the post-test compared to the test (P = 0.000, d = 1.06). In the present study, the peak in the domain of electrical activity of biceps femoris muscle showed a significant increase of 30.51% during the post-test compared with the pre-test (P = 0.004, d = 1. 59). Abdominal external oblique muscle at the peak of domain of electrical activity in the experimental group showed a significant increase of 117.1 117 during the post-test compared to the pre-test (P = 0.11, p = 0.72). Also, at the peak of domain of electrical activity of the rectus abdominis muscle, a significant decrease of 14.88% during the post-test compared with the test (P = 0.003, d = 0.72). At the peak amplitude of electrical activity, the spinal retractor muscle showed a significant reduction of 9.35% in comparison with the post-test and pre-test (P = 0.008, p = 0.88). At the peak and mean of the domain of electrical activity of other muscles, no significant difference was observed between the post-test and pre-test comparisons (P> 0.05). Conclusion: During the walking stance phase in the group of patients with low back pain, the median electrical movement of the internal gastrocnemius muscle and the external and abdominal external oblique muscle and rectus abdominis muscle increased. According to the results, lumbar biceps can be designed for those with low back pain, which has the greatest impact on the central muscle and the leg muscles of the longitudinal arch. In patients with chronic low back pain, the speed of running is lower than that of healthy people, and low frequencies of frequency spectrum components can indicate a pattern of protective walking in these patients. This change in speed and low frequency during running indicates a decrease in mechanical efficiency in patients with low back pain. Regarding the high activity of the tibialis anterior muscle in patients with low back pain with prenitom versus healthy subjects, a significant reduction in the median frequency of the anterior medullary muscle during post-test compared with the pre-test during response phase showed the effects Positive Long-term use of lumbar bracelets. Also, the electrical activity domane of internal gastrocnemius muscle and biceps femoris muscle was accompanied by an increase, which could indicate that they were able to increase their electrical activity in order to control and reduce back pain in patients with low back muscle pain.

Actions (login required)

View Item