Chronic Adaptations to Spinal Flexion Exposure

An experimental study, which will aim to compare changes of trunk mechanical properties and neuromuscular control following spinal flexion exposure in crane operators and control subjects.

Inclusion Criteria:Crane operators: employed as crane operators for more than 3 yearsOccupational workers with a predominantly non static job (e.g. combination of sitting and standing)Exclusion Criteria:History of chronic low back painEpisode of acute low back painHip injury in the past six monthsPrevious spine, pelvis or hip surgeryHypermobility, diagnosed with the Beighton scoreHigh intensity resistance training (> 75 % of 1 repetition maximum) more than two times a weekControl group: sporting or recreational activities, that include repetitive spinal flexion or maintenance of a flexed posture (for example cycling or rowing).