Controlled intervention with group randomization.
To investigate the effectiveness of a 6-month neuromuscular exercise
program for reducing the incidence of low back pain
(LBP) and disability in young conscripts, with a healthy back at the beginning of their compulsory military service.
Summary of Background Data.
Basic military training is physically demanding on the back and requires adequate physical fitness. LBP causes significant morbidity and absence from military service.
Participants were conscripts of 4 successive age cohorts (n = 1409). In the prestudy year, before adoption of the intervention, 2 successive cohorts of conscripts of 4 companies (n = 719) were followed prospectively for 6 months to study the baseline incidence of different categories of LBP. In the intervention year, conscripts (n = 690) of 2 new cohorts of the same companies (intervention group: antitank, engineer; control group: signal, mortar) were followed for 6 months. The intervention program aimed to improve conscripts' control of their lumbar neutral zone and specifically to avoid full lumbar flexion in all daily tasks.
Total number and incidence of off-duty days due to LBP were significantly decreased in the intervention companies compared with controls (adjusted hazard ratio = 0.42, 95% confidence interval = 0.18–0.94, P
= 0.035). The number of LBP cases, number of health clinic visits due to LBP, and number of the most severe cases showed a similar decreasing trend but without statistical significance.
These findings provide evidence that exercise
and education to improve control of the lumbar neutral zone have a prophylactic effect on LPB-related off-duty service days in the military environment when implemented as part of military service among young healthy men.