Chronic Adaptations to Spinal Flexion Exposure

Chronic Adaptations to Spinal Flexion Exposure in Crane Operators

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.

Our experimental study will include 40 participants, more specifically 15 crane operators and 15 control subjects. All participants will complete a 60-min protocol of intermittent trunk flexion. Measurements of trunk mechanical properties and neuromuscular control will be performed prior to and following the 60-min protocol.

Inclusion Criteria:

• Crane operators: employed as crane operators for more than 3 years
• Occupational workers with a predominantly non static job (e.g. combination of sitting and standing)

Exclusion Criteria:

• History of chronic low back pain
• Episode of acute low back pain
• Hip injury in the past six months
• Previous spine, pelvis or hip surgery
• Hypermobility, diagnosed with the Beighton score
• High intensity resistance training (> 75 % of 1 repetition maximum) more than two times a week
• Control group: sporting or recreational activities, that include repetitive spinal flexion or maintenance of a flexed posture (for example cycling or rowing).