THE CLINICAL STUDY OF LOW BACK EXERCISE
Chiaki Fukuda (The Meiji Life Foundation of health and Welfare, Tokyo, Japan)
Kyozo Yonemoto (The Jikei University, Tokyo, Japan)
My presentation will examine the effects of exercise in controlled classes, on low back pain. We conducted those classes with Department of Rehabilitation, The Jikei University School of Medicine, a total 10 classes over 5 years, in order to evaluate both anatomy and biomechanics.
There were 142 people suffering from chronic low back pain in the classes. There were 7 classes hold during the 3 months to teach proper exercises, so that the patients could exercise at home daily. The exercises included abdominal and back muscle strengthening and stretching. The result after 3 months were positive. Most of the patients experienced relief from pain as the thickness of abdminal muscle increased. This was measured by echogram and an increased ability by the patients to do sit-up. We considered the relationship between those results and aging and neurological sign.
THE EFFECT OF LUMBAR CORSET DURING FORWARD BENDING
- AN ELECTROMYOGRAPHIC STUDY -
Osamu Shirado, M.D., Toshikazu Ito, R.P.T., Yukio Mano, M.D., Kiyoshi Kaneda, M.D.
(Hokkaido University, Sapporo, Japan)
Purpose: The hypothesis of this study is that lumbar corset reduces trunk muscle fatigue during forward bending. The current study was designed to investigate this hypothesis.
Method: Subjects consisted of 30 volunteer nurses (16 healthy and 14 chronic LBP nurses: mean, 26.3 years). They were asked to remain 30 。forward bending. The EMG activity of trunk muscles was monitored with surface electrodes, and the average integrated EMG was calculated. Before and after the performance, the myoelectric power spectrum of the erector spinae was analysed during maximum isometric contraction in a long-sitting posture.
Result: The average integrated EMG for each muscle decreased by 35 - 70% in the posture with the lumbar corset (p<0.05). After the performance without the corset, the mean power frequency (MPF) significantly declined in the nurses with CLBP (p<0.01). With the corset, the MPF after the performance was not significantly different from that before the performance.
Conclusion: This current study demonstrated that lumbar corset improved and prevented low-back pain in the nurses by reducing trunk muscle fatigue during forward bending.