Cook C., Shroyer J.Vigorous physical activity and fall occurrence. Phys Occup Ther Geriatr. 2003;20:1-19.
2.
Centers for Disease Control and Prevention Division of Nutrition.Physical activity and obesity U.S. physical activity statistics . http://apps.nccd.cdc.gov/PASurveillance/DemoComparev.asp .
3.
Rimmer JHUse of the ICF in identifying factors that impact participation in physical activity/rehabilitation among people with disabilities. Disabil Rehabil. 2006;28:1087-1095.
4.
Proper KI, Heymans MW, Chin Q., et al. Promoting physical activity with people in different places-a Dutch perspective. J Sci Med Sport. 2006;9:371-377.
5.
Smith MD, Russell A., Hodges PWDisorders of breathing and continence have a stronger association with back pain than obesity and physical activity. Aust J Physiother . 2006;52:11-16.
6.
Hurwitz EL, Morgenstern H., Chiao C.Effects of recreational physical activity and back exercises on low back pain and psychological distress: findings from the UCLA Low Back Pain Study. Am J Public Health. 2005;95:1817-1824.
7.
George SZ, Fritz JM, Childs JDInvestigation of elevated fear-avoidance beliefs for patients with low back pain: a secondary analysis involving patients enrolled in physical therapy clinical trials. J Orthop Sports Phys Ther. 2008;38:50-58.
8.
Cedraschi C. , Allaz AFHow to identify patients with a poor prognosis in daily clinical practice. Best Pract Res Clin Rheumatol . 2005;19:577-591.