Neuromuscular Research Laboratory, Department of Sports Medicine and Nutrition, School of Health and Rehabilitation Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
United States Navy, Norfolk, Virginia, USA.
Orthop J Sports Med. 2014 May 12;2(5):2325967114532780. doi: 10.1177/2325967114532780. eCollection 2014 May.
Single-leg balance (SLB) can be chronically impaired after low back pain (LBP). Impaired SLB is a risk factor for recurrent LBP and lower extremity injury. In the United States military, the special forces operator (SFO) deploys on high-risk missions under extreme conditions, and impaired SLB can potentially threaten SFO safety and mission success.
To compare SLB in fully operational SFOs with and without a history of LBP. The hypothesis was that SLB deficits would be present in SFOs with a history of LBP.
Cross-sectional study; Level of evidence, 3.
A total of 226 SFOs were included in this analysis. Comparisons were made between SFOs with and without medical chart documented history of LBP (LBP group [n = 43]: mean age = 31.2 ± 10.3 years, mean height = 177.3 ± 7.2 cm, mean mass = 87.3 ± 11.8 kg; healthy group [n = 183]: mean age = 28.0 ± 6.0 years, mean height = 177.9 ± 6.0 cm, mean mass = 84.9 ± 8.8 kg). Bilateral SLB was tested (eyes open and eyes closed) in both groups using a force plate. The variability in the ground-reaction forces was averaged across 3 trials for each leg for both conditions. Comparisons were made between legs in the LBP and between the LBP and healthy group (α = .05).
There were significant between-group differences for each leg for both conditions, with the healthy group demonstrating better SLB compared with the LBP group. P values ranged from .01 to .03.
Impaired SLB persists in SFOs with previously reported LBP. Balance assessments of individuals who report LBP may assist with designing targeted interventions to address potential deficits that may increase the risk of future injury.
SFOs with a known history of LBP would benefit from examination of SLB and may benefit from balance training to resolve any deficits that may be present to lower the potential risk for future injury.
下腰痛（LBP）后，单腿平衡（SLB）可能会长期受损。SLB 受损是 LBP 复发和下肢损伤的危险因素。在美国军队中，特种作战人员（SFO）在极端条件下执行高风险任务，SLB 受损可能会威胁到 SFO 的安全和任务成功。
比较有和无 LBP 病史的现役 SFO 的 SLB。假设 SFO 有 LBP 病史时，SLB 会出现缺陷。
横断面研究；证据水平，3 级。
共有 226 名 SFO 参与了这项分析。比较了有和无医疗记录的 LBP 病史的 SFO（LBP 组[n=43]：平均年龄 31.2±10.3 岁，平均身高 177.3±7.2cm，平均体重 87.3±11.8kg；健康组[n=183]：平均年龄 28.0±6.0 岁，平均身高 177.9±6.0cm，平均体重 84.9±8.8kg）的双侧 SLB。使用测力板测试两组的双侧 SLB（睁眼和闭眼）。在每种条件下，每条腿的 3 次试验的地面反作用力的变异性在每条腿上进行平均。对 LBP 组的双腿之间以及 LBP 组和健康组之间进行了比较（α=.05）。
在两种情况下，每组双腿之间均存在显著的组间差异，健康组的 SLB 明显优于 LBP 组。P 值范围从.01 到.03。
有先前报告的 LBP 的 SFO 存在 SLB 受损。对报告有 LBP 的个体进行 SLB 评估可能有助于设计有针对性的干预措施，以解决可能存在的潜在缺陷，从而降低未来受伤的风险。
有已知 LBP 病史的 SFO 将受益于 SLB 检查，并且可能受益于平衡训练，以解决可能存在的任何缺陷，以降低未来受伤的潜在风险。
