Phimphasak C, Swangnetr M, Puntumetakul R, Chatchawan U, Boucaut R
a School of Physical Therapy, Faculty of Associated Medical Sciences, Khon Kaen University , 123 Mitraphab Rd, Muang Khon Kaen, Khon Kaen 40002 , Thailand.
b Research Centre in Back, Neck, Other Joint Pain and Human Performance (BNOJPH), Khon Kaen University , 123 Mitraphab Rd, Muang Khon Kaen, Khon Kaen 40002 , Thailand.
Ergonomics. 2016;59(1):112-20. doi: 10.1080/00140139.2015.1052570. Epub 2015 Jun 30.
Prolonged sitting during sedentary work has been reported as a potential risk factor for low back pain. Furthermore, prolonged sitting can result in both reduced spinal height (SH) and lumbar range of motion (LROM). This study compared the effects of no intervention (control) with two recovery postures on SH and LROM (flexion and extension) during prolonged sitting. Twenty-four participants were randomly assigned to three interventions for three consecutive days. The interventions comprised two seated lumbar extension recovery postures (unsupported sustained and supported dynamic lumbar extension postures) and a control. Both interventions facilitated a relatively short recovery period for both SH and LROM. Supported dynamic lumbar extension conditions significantly helped SH recovery, as compared with control condition, after the first recovery posture intervention, and both postures have potential to maintain LROM. However, both postures failed to induce SH recovery over an extended time.
Unsupported sustained lumbar extension and supported dynamic lumbar extension postures may serve as effective and practical methods for reducing rate of SH loss and maintaining LROM. However, these postures should be further examined in various ‘doses’ to define optimal protocol for effectively minimising SH loss over time.
据报道，久坐工作期间长时间坐着是下背痛的一个潜在风险因素。此外，长时间坐着会导致脊柱高度（SH）降低和腰椎活动范围（LROM）减小。本研究比较了无干预（对照组）与两种恢复姿势对长时间坐着期间SH和LROM（前屈和后伸）的影响。24名参与者被随机分配到三种干预措施中，连续进行三天。干预措施包括两种坐姿腰椎后伸恢复姿势（无支撑持续和有支撑动态腰椎后伸姿势）和一个对照组。两种干预措施都为SH和LROM促成了相对较短的恢复期。与对照组相比，在第一次恢复姿势干预后，有支撑动态腰椎后伸情况显著有助于SH恢复，并且两种姿势都有维持LROM的潜力。然而，两种姿势在较长时间内都未能促使SH恢复。
无支撑持续腰椎后伸和有支撑动态腰椎后伸姿势可能是降低SH丢失率和维持LROM的有效且实用的方法。然而，这些姿势应在各种“剂量”下进一步研究，以确定有效最小化随时间推移的SH丢失的最佳方案。
