• 1
    Lawrence RC, Felson DT, Helmick CG, Arnold LM, Choi H, Deyo RA, et al. Estimates of the prevalence of arthritis and other rheumatic conditions in the United States: part II. Arthritis Rheum 2008; 58: 2635.
  • 2
    Picavet HS, Hazes JM. Prevalence of self reported musculoskeletal diseases is high. Ann Rheum Dis 2003; 62: 64450.
  • 3
    Kopec JA, Rahman MM, Berthelot JM, Le Petit C, Aghajanian J, Sayre EC, et al. Descriptive epidemiology of osteoarthritis in British Columbia, Canada. J Rheumatol 2007; 34: 38693.
  • 4
    Slemenda CW. The epidemiology of osteoarthritis of the knee. Curr Opin Rheumatol 1992; 4: 54651.
  • 5
    Reijman M, Pols HA, Bergink AP, Hazes JM, Belo JN, Lievense AM, et al. Body mass index associated with onset and progression of osteoarthritis of the knee but not of the hip: the Rotterdam Study. Ann Rheum Dis 2007; 66: 15862.
  • 6
    Woolf AD, Pfleger B. Burden of major musculoskeletal conditions. Bull World Health Organ 2003; 81: 64656.
  • 7
    Hunter DJ, March L, Sambrook PN. Knee osteoarthritis: the influence of environmental factors. Clin Exp Rheumatol 2002; 20: 93100.
  • 8
    Felson DT, Lawrence RC, Dieppe PA, Hirsch R, Helmick CG, Jordan JM, et al. Osteoarthritis: new insights. Part 1: the disease and its risk factors. Ann Intern Med 2000; 133: 63546.
  • 9
    Felson DT, Niu J, Clancy M, Sack B, Aliabadi P, Zhang Y. Effect of recreational physical activities on the development of knee osteoarthritis in older adults of different weights: the Framingham Study. Arthritis Rheum 2007; 57: 612.
  • 10
    Spector TD, Harris PA, Hart DJ, Cicuttini FM, Nandra D, Etherington J, et al. Risk of osteoarthritis associated with long-term weight-bearing sports: a radiologic survey of the hips and knees in female ex-athletes and population controls. Arthritis Rheum 1996; 39: 98895.
  • 11
    Buckwalter JA, Lane NE. Athletics and osteoarthritis. Am J Sports Med 1997; 25: 87381.
  • 12
    Schouten JS, de Bie RA, Swaen G. An update on the relationship between occupational factors and osteoarthritis of the hip and knee. Curr Opin Rheumatol 2002; 14: 8992.
  • 13
    Manninen P, Heliovaara M, Riihimaki H, Suoma-Iainen O. Physical workload and the risk of severe knee osteoarthritis. Scand J Work Environ Health 2002; 28: 2532.
  • 14
    Kujala UM, Marti P, Kaprio J, Hernelahti M, Tikkanen H, Sarna S. Occurrence of chronic disease in former top-level athletes: predominance of benefits, risks or selection effects? Sports Med 2003; 33: 55361.
  • 15
    Felson DT, Zhang Y, Hannan MT, Naimark A, Weissman B, Aliabadi P, et al. Risk factors for incident radiographic knee osteoarthritis in the elderly: the Framingham Study. Arthritis Rheum 1997; 40: 72833.
  • 16
    McAlindon TE, Wilson PW, Aliabadi P, Weissman B, Felson DT. Level of physical activity and the risk of radiographic and symptomatic knee osteoarthritis in the elderly: the Framingham Study. Am J Med 1999; 106: 1517.
  • 17
    Sandmark H, Vingard E. Sports and risk for severe osteoarthrosis of the knee. Scand J Med Sci Sports 1999; 9: 27984.
  • 18
    Conaghan PG. Update on osteoarthritis part 1: current concepts and the relation to exercise. Br J Sports Med 2002; 36: 3303.
  • 19
    Szoeke CE, Cicuttini FM, Guthrie JR, Clark MS, Dennerstein L. Factors affecting the prevalence of osteoarthritis in healthy middle-aged women: data from the longitudinal Melbourne Women's Midlife Health Project. Bone 2006; 39: 114955.
  • 20
    Rogers LQ, Macera CA, Hootman JM, Ainsworth BE, Blairi SN. The association between joint stress from physical activity and self-reported osteoarthritis: an analysis of the Cooper Clinic data. Osteoarthritis Cartilage 2002; 10: 61722.
  • 21
    Manninen P, Riihimaki H, Heliovaara M, Suomalainen O. Physical exercise and risk of severe knee osteoarthritis requiring arthroplasty. Rheumatology (Oxford) 2001; 40: 4327.
  • 22
    White JA, Wright V, Hudson AM. Relationships between habitual physical activity and osteoarthrosis in ageing women. Public Health 1993; 107: 45970.
  • 23
    Lane NE, Oehlert JW, Bloch DA, Fries JF. The relationship of running to osteoarthritis of the knee and hip and bone mineral density of the lumbar spine: a 9 year longitudinal study. J Rheumatol 1998; 25: 33441.
  • 24
    Sutton AJ, Muir KR, Mockett S, Fentem P. A case-control study to investigate the relation between low and moderate levels of physical activity and osteoarthritis of the knee using data collected as part of the Allied Dunbar National Fitness Survey. Ann Rheum Dis 2001; 60: 75664.
  • 25
    Hootman JM, Macera CA, Helmick CG, Blair SN. Influence of physical activity-related joint stress on the risk of self-reported hip/knee osteoarthritis: a new method to quantify physical activity. Prev Med 2003; 36: 63644.
  • 26
    Nelson ME, Rejeski WJ, Blair SN, Duncan PW, Judge JO, King AC, et al. Physical activity and public health in older adults: recommendation from the American College of Sports Medicine and the American Heart Association. Med Sci Sports Exerc 2007; 39: 143545.
  • 27
    Scott CC, Athanasiou KA. Mechanical impact and articular cartilage. Crit Rev Biomed Eng 2006; 34: 34778.
  • 28
    Slemenda C, Heilman DK, Brandt KD, Katz BP, Mazzuca SA, Braunstein EM, et al. Reduced quadriceps strength relative to body weight: a risk factor for knee osteoarthritis in women? Arthritis Rheum 1998; 41: 19519.
  • 29
    Felson DT, Lawrence RC, Hochberg MC, McAlindon T, Dieppe PA, Minor MA, et al. Osteoarthritis: new insights. Part 2: treatment approaches. Ann Intern Med 2000; 133: 72637.
  • 30
    Deeg DJ, van Tilburg T, Smit JH, de Leeuw ED. Attrition in the Longitudinal Aging Study Amsterdam: the effect of differential inclusion in side studies. J Clin Epidemiol 2002; 55: 31928.
  • 31
    Stel VS, Smit JH, Pluijm SM, Visser M, Deeg DJ, Lips P. Comparison of the LASA Physical Activity Questionnaire with a 7-day diary and pedometer. J Clin Epidemiol 2004; 57: 2528.
  • 32
    Ainsworth BE, Haskell WL, Leon AS, Jacobs DR Jr, Montoye HJ, Sallis JF, et al. Compendium of physical activities: classification of energy costs of human physical activities. Med Sci Sports Exerc 1993; 25: 7180.
  • 33
    Kemper HC, Bakker I, Twisk JW, van Mechelen W. Validation of a physical activity questionnaire to measure the effect of mechanical strain on bone mass. Bone 2002; 30: 799804.
  • 34
    Verweij LM, Van Schoor NM, Dekker J, Visser M. Distinguishing four components underlying physical activity: a new approach to physical activity questionnaire data in old age. In press.
  • 35
    Expert Panel on the Identification, Evaluation, and Treatment of Overweight in Adults. Clinical guidelines on the identification, evaluation, and treatment of overweight and obesity in adults: executive summary. Am J Clin Nutr 1998; 68: 899917.
  • 36
    Dik M, Deeg DJ, Visser M, Jonker C. Early life physical activity and cognition at old age. J Clin Exp Neuropsychol 2003; 25: 64353.
  • 37
    Visser M, Launer LJ, Deurenberg P, Deeg DJ. Total and sports activity in older men and women: relation with body fat distribution. Am J Epidemiol 1997; 145: 75261.
  • 38
    Beekman AT, Deeg DJ, Van Limbeek J, Braam AW, De Vries MZ, Van Tilburg W. Criterion validity of the Center for Epidemiologic Studies Depression scale (CES-D): results from a community-based sample of older subjects in The Netherlands. Psychol Med 1997; 27: 2315.
  • 39
    Thorstensson CA, Petersson IF, Jacobsson LT, Boegard TL, Roos EM. Reduced functional performance in the lower extremity predicted radiographic knee osteoarthritis five years later. Ann Rheum Dis 2004; 63: 4027.
  • 40
    Slemenda C, Brandt KD, Heilman DK, Mazzuca S, Braunstein EM, Katz BP, et al. Quadriceps weakness and osteoarthritis of the knee. Ann Intern Med 1997; 127: 97104.
  • 41
    Racunica TL, Teichtahl AJ, Wang Y, Wluka AE, English DR, Giles GG, et al. Effect of physical activity on articular knee joint structures in community-based adults. Arthritis Rheum 2007; 57: 12618.
  • 42
    Kerin A, Patwari P, Kuettner K, Cole A, Grodzinsky A. Molecular basis of osteoarthritis: biomechanical aspects. Cell Mol Life Sci 2002; 59: 2735.
  • 43
    Griffin TM, Guilak F. The role of mechanical loading in the onset and progression of osteoarthritis. Exerc Sport Sci Rev 2005; 33: 195200.
  • 44
    Herzog W, Clark A, Longino D. Joint mechanics in osteoarthritis. Novartis Found Symp 2004; 260: 7995.
  • 45
    Bierma-Zeinstra SM, Koes BW. Risk factors and prognostic factors of hip and knee osteoarthritis. Nat Clin Pract Rheumatol 2007; 3: 7885.
  • 46
    Szoeke CE, Dennerstein L, Wluka AE, Guthrie JR, Taffe J, Clark MS, et al. Physician diagnosed arthritis, reported arthritis and radiological non-axial osteoarthritis. Osteoarthritis Cartilage 2008; 16: 84650.