Effect of Resting in a Chair, Resting with Range of Motion Exercises, and Back Strengthening Exercises on Pain and the Flexion-relaxation Ratio of Computer Workers with Low Back Pain
Won-Gyu Yoo, Won-Gyu Yoo
Abstract
[Purpose] This study examined the effects of a relaxation chair and resting with simple range of motion exercises during computer work and low back muscle strengthening exercises after computer work on pain and the flexion-relaxation (FR) ratio of one computer worker with LBP. [Subjects] The subject of this study was a 37 year-old male who complained of severe LBP pain at the L4 level. [Methods] In the study, the subject worked on a computer for 5 h each day for 3 days and followed a different program each day. [Results] In Session 1, the FR ratios before and after work were 19% and 38% (+19%), respectively. The respective VAS scores before and after work were 5 and 8 (+3). In Session 2, the FR ratios before and after work were 18% and 21% (+3%), respectively. The respective VAS scores were 5 and 6 (+1). In session 3, the FR ratios before and work were 22% and 29% (+7%), respectively, and the VAS scores were 5 and 6 (+1). [Conclusion] This study suggests that it is more effective to perform regular, passive exercises to prevent LBP in computer users.
Keywords: Flexion-relaxation Ratio; LBP; Resting.
References
- Watanabe S, Eguchi A, Kobara K, et al. : Influence of trunk muscle co-contraction on spinal curvature during sitting for desk work. Electromyogr Clin Neurophysiol, 2007, 47: 273–278
- O’Sullivan PB, Mitchell T, Bulich P, et al. : The relationship beween posture and back muscle endurance in industrial workers with flexion-related low back pain. Man Ther, 2006, 11: 264–271
- van Dieën JH, de Looze MP, Hermans V: Effects of dynamic office chairs on trunk kinematics, trunk extensor EMG and spinal shrinkage. Ergonomics, 2001, 44: 739–750
- Samani A, Holtermann A, Søgaard K: Active pauses induce more variable electromyographic pattern of the trapezius muscle activity during computer work. J Electromyogr Kinesiol, 2009, 19: e430–e437
- Crenshaw AG, Djupsjöbacka M, Svedmark A: Oxygenation, EMG and position sense during computer mouse work. Impact of active versus passive pauses. Eur J Appl Physiol, 2006, 97: 59–67
- Cailliet R: Low back pain syndrome, 5th ed. Philadelphia, F. A. Davis Company, 1995
- Neumann DA: Kinesiology of the musculoskeletal system: foundations for physical rehabilitation. St Louis: Mosby, 2009
- van Dieën JH, Cholewicki J, Radebold A: Trunk muscle recruitment patterns in patients with low back pain enhance the stability of the lumbar spine. Spine, 2003, 28: 834–841
- Mathieu PA, Fortin M: EMG and kinematics of normal subjects performing trunk flexion/extensions freely in space. J Electromyogr Kinesiol, 2000, 10: 197–209
Source: PubMed