Andersen, L. L., KjÆr, M., SØgaard, K., Hansen, L., Kryger, A. I. and SjØgaard, G. (2008), Effect of two contrasting types of physical exercise on chronic neck muscle pain. Arthritis Care & Research, 59: 84–91. doi: 10.1002/art.23256
Sitthipornvorakul E, Janwantanakul P, Purepong N, Pensri P, van der Beek AJ. The association between physical activity and neck and low back pain: a systematic review. Eur Spine J. 2010 Nov 27. [Epub ahead of print]
Luomajoki H, Kool J, de Bruin ED, Airaksinen O. Movement control tests of the low back; evaluation of the difference between patients with low back pain and healthy controls.BMC. 2008; 9: 170.