A dancer complaining of low back pain with activities that require the mobility in the lumbar spine and thoracic spine, such as an arabesque or attitude to the back, require a thorough assessment.
If appropriate, educating the dancer through different movement strategies can help limit the strain into their low backs with these positions and movements.
Depending on the acuity of the dancers symptoms, you may be able to start by assessing the thoracic rotation contribution in arabesque. If this is not possible, begin assessment of rotation with the dancer sitting and arms folded in front to gain an idea of their range and movement characteristics; i.e: Is their thoracic spine moving or are they protracting one scapula or retracting the other scapula, do they side bend or lateral shear to mimic rotation? The dancer should have about 45 degrees for thoracic rotation to the right and left.
Pictured on the right is thoracic rotation with the arms folded in front of the chest demonstrating no compensations. Pictured on the left is thoracic rotation with the arms folded