However, it's also possible that sleeping on your side can lead to more serious problems, such as: Sleep positions that provide better alignment can relieve pain in the shoulder and collarbone ...

So, assuming right-handed preference among the crew, this finding suggests that handedness may have affected their clavicle chemistry, perhaps through putting more stress on their right side ...

[7] Some authors have suggested that less than optimal results can occur when shoulder laxity or other intra-articular causes of distal clavicle pain or impingement are not addressed. [7 ...

When this occurs, it often leads to pain ... each side of the neck. These large, two-headed structures originate from the top ...