Reduction of Risk for Low Back Injury in Theater of Operations
Technical Report,30 Sep 2011,29 Mar 2015
University of South Florida Tampa United States
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The purpose of this project was to assess the effectiveness of high intensity progressive resistance exercise HIPRE training targeting the lumbar extensors to improve lumbar extension muscular strength and endurance in US Army Soldiers. A 2-arm, cluster randomized controlled trial was conducted with US Army Soldiers training to become combat medics from Fort Sam Houston, TX. Soldiers were randomized by platoon to receive lumbar extensor HIPRE training HIPRE, n 298 or core stabilization exercise training CORE, n 284 at 1 set, 1Xweek, for 11 weeks. Isometric lumbar extension muscular strength, dynamic lumbar extension muscular endurance, and isometric core muscular endurance were assessed before and after the 11-week intervention. Linear mixed effects analyses were used to assess group differences on these measures at 11-week follow-up. Following the 11-week intervention, adjusted lumbar extension muscular strength was 9.7 greater p 0.001 for HIPRE compared with CORE. Adjusted lumbar extension muscular endurance was 12.3 greater p 0.021 for HIPRE compared with CORE. No improvements in core muscular endurance were observed for the HIPRE and CORE groups. These findings indicate that lumbar extensor HIPRE training is effective to improve lumbar extension muscular strength and endurance in US Army Soldiers.