ArticleHuman factors2026
Does the Directive to Avoid Low Back Flexion Hinder Physical Performance? Examining Isometric Strength in Postures Adopted During Light Mass Lifting.
Article in Human factors, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
ObjectiveObserve how instruction to avoid rounding the low back while lifting a relatively light mass impacts isometric lifting strength.BackgroundAs opposed to manual materials handling training directives recommending whole-body techniques such as a squat lift, targeting specific body regions such as low back curvature, theoretically affords workers greater flexibility to organize the rest of the body to reduce musculoskeletal loading without reducing physical performance. However, providing these directives during sub-maximal tasks may not prompt prioritization of physical performance as individuals self-organize, eventually making the intervention ineffective.MethodsForty participants (50% female) lifted a crate with and without the instruction to avoid rounding the low back. Postures at the initiation of crate lifting were replicated to test isometric strength.ResultsAt the group-level, instruction decreased low back flexion (
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