Mayer John M, Nuzzo James L
School of Physical Therapy and Rehabilitation Sciences, Morsani College of Medicine, University of South Florida, Tampa, FL, USA.
Work. 2015;50(4):621-7. doi: 10.3233/WOR-141831.
Firefighting is a dangerous occupation with a high incidence of low back pain and injury. Abnormal back muscle function and morphology has been linked to low back pain and poor physical performance. The effect of exercise training on back muscle size and symmetry has not been investigated in firefighters.
The purpose of this study was to assess the effect of worksite exercise training for eliciting lumbar multifidus muscle hypertrophy in firefighters.
A cluster randomized controlled trial was conducted with healthy, career firefighters (n=64) from a medium-sized fire department. Participants were randomized by fire station to exercise training (n=36) (supervised back and core exercise performed on duty, 2X/week, 24 weeks) or control (n=28). The cross-sectional area (CSA) of the L4 and L5 lumbar multifidus muscle was assessed with ultrasonography at baseline and following the intervention.
At 24 weeks, no significant differences were noted between the groups in the adjusted (by baseline scores and body mass) L4 and L5 lumbar multifidus muscle CSA and asymmetry values.
A worksite exercise training program targeting the back and core is not effective for eliciting hypertrophy of the lumbar multifidus muscle in healthy firefighters.
消防工作是一项危险职业，腰痛和受伤发生率很高。背部肌肉功能和形态异常与腰痛及身体表现不佳有关。尚未对消防员进行运动训练对背部肌肉大小和对称性的影响的研究。
本研究的目的是评估工作场所运动训练对消防员腰多裂肌肥大的影响。
对一个中型消防部门的健康职业消防员（n = 64）进行了一项整群随机对照试验。参与者按消防站随机分为运动训练组（n = 36）（在执勤时进行监督下的背部和核心运动，每周2次，共24周）或对照组（n = 28）。在基线和干预后，用超声评估L4和L5腰多裂肌的横截面积（CSA）。
在24周时，两组在调整后（根据基线分数和体重）的L4和L5腰多裂肌CSA及不对称值方面没有显著差异。
针对背部和核心的工作场所运动训练计划对健康消防员的腰多裂肌肥大无效。
