Showing 2 results for Isostation
Gh Oliaiy , M Akbari , A Nakhaiy ,
Volume 56, Issue 2 (4-1998)
Abstract
The effect of some anthropometric factors and loading on paravertebral muscles was tested in this study. Thirty two healthy men with mean age of 25.25 years participated in this study. They didn't have history of low back pain since 12 months ago. The effect of weight, height, upper limb length, abdominal & chest circumference and upper body height and other factors e.g. body mass and functional capacity indexes on maximum isometric torque of paravertebral muscles and spinal range of motion in all planes of movement and effect of loading with 0, 5, 10, 15 kg loads on paravertebral factors e.g. dynamic torque, velocity, work, power, and slope of torque was examined with a dynamometer named ISOSTATION B-200. Correlation, analysis of variance and t-test was used in SPSS program. Results show that maximum isometric torque and functional capacity index increased with increasing weight abdominal and chest circumference and body mass index (P<0.05). Height, upper body height and upper limb length don't have effects on this factors, and anthropometric factors don't have effects on range of motion. Maximum dynamic torque, maximum velocity, work and power were significantly increased and time of movement & slope of torque were significantly decreased while load increased (P<0.05). This study showed that load-velocity relationship in limb muscles can not help the paravertebral muscles studies because paravertebral muscles histologically differ from limb muscles.
Talebian S, Olyaei Gr, Hadian Mr, Bagheri H, Mehrdad S,
Volume 65, Issue 4 (7-2007)
Abstract
Background: The changes in motor control after the use of a supportive belt can contribute to the understanding of its effects on performance. The aim of this study is to quantify motion pattern values relative to the spinal column during the use of a lumbosacral belt.
Methods: For fifty healthy female volunteers, the range of motion, maximum isometric torque and changes of phase angle of maximum torque and velocity in two positions, standing and sitting, in two directions, flexion and extension, following the use of a lumbosacral belt were measured using an isoinertial dynamometer (Isostation B200) and compared.
Results: Range of motion in both directions in both positions was reduced significantly (P<0.05). Significant reduction of maximum isometric torque was observed in flexion while sitting and in extension while standing and sitting (P<0.05). Phase angle of maximum torque and velocity also changed significantly in both directions and both positions (P<0.05).
Conclusion: The lumbosacral belt can act in different ways to prevent injury. It reduces the forces applied to lumbar vertebra and, by changing the maximum torque and velocity phase angles at the onset of range of motion, provides greater stability for joints. Furthermore, the belt can reduce stress imposed on the posterior joints of the spine and limits several momentary forces at the onset of joint movement. Under these conditions, joint injuries can be reduced and prevent some of the mechanical stress that causes lumbar joint disease.
