Measuring one’s ability to alter, change, and reduce lumbar flexion under load: A case report

Abstract

One cannot completely avoid spinal flexion while deadlifting, but is it possible to reduce it? The hypothesis of this case study is: “One can reduce their lumbar flexion under load voluntarily and immediately by simply being requested to do so.” This case study documented an experienced powerlifter modifying his lumbar flexion under a barbell-loaded isometric weight of 150 kg. The participant was instructed to perform a 45° angled static hip hinge for 25 s for two sets – with a 10-min rest period between sets. The sacrum and lumbar spine were measured using a digital inclinometer, covering the two key positions designated “max-flexion” and “max-neutral.” The inclinometer was placed over S1/S2 and L5/T12 for all measurements. The participant’s standing neutral (lordosis) was measured with a digital inclinometer at −35°. For a max unloaded flexion, the participant was asked to touch his toes, and a second measurement was taken at 69°. Between the initial max-flexion and set 2’s loaded “max-neutral,” the lifter could avoid flexing 40° or 58% of his max flexion merely from being requested to do so. The participant maintained 42% of his max flexion while under a significant load for 25 s.