title: Injuries in sedentary individuals enrolled in a 12-month, randomized, controlled, exercise trial.
abstract: BACKGROUND
  The risk of musculoskeletal injury with the introduction of moderate-to-vigorous exercise in sedentary adults is not well established. The purpose of this report is to examine the effect of a 12-month exercise intervention on musculoskeletal injury and bodily pain in predominately overweight, sedentary men (n = 102) and women (n = 100), ages 40 to 75 years.
  
  
  METHODS
  Participants were randomized to a moderate-to-vigorous aerobic exercise intervention (EX) (6 d/wk, 60 min/d, 60% to 85% max. heart rate) or usual lifestyle control (CON). Participants completed a self-report of musculoskeletal injury and body pain at baseline and 12-months.
  
  
  RESULTS
  The number of individuals reporting an injury (CON; 28% vs. EX; 28%, P = .95) did not differ by group. The most commonly injured site was lower leg/ankle/foot. The most common causes of injury were sports/physical activity, home maintenance, or "other." In the control group, bodily pain increased over the 12 months compared with the exercise group (CON -7.9, EX -1.4, P = .05). Baseline demographics and volume of exercise were not associated with injury risk.
  
  
  CONCLUSIONS
  Previously sedentary men and women randomized to a 12-month aerobic exercise intervention with a goal of 360 min/wk reported the same number of injuries as those in the control group and less bodily pain.
authors.affiliation: Dept of Physical Therapy, University of British Columbia, Vancouver, British Columbia, Canada.
authors.forename: Kristin
authors.initials: K
authors.lastname: Campbell
authors.forename: Karen
authors.initials: K
authors.lastname: Foster-Schubert
authors.forename: Liren
authors.initials: L
authors.lastname: Xiao
authors.forename: Catherine
authors.initials: C
authors.lastname: Alfano
authors.forename: Lisa Cadmus
authors.initials: LC
authors.lastname: Bertram
authors.forename: Catherine
authors.initials: C
authors.lastname: Duggan
authors.forename: Melinda
authors.initials: M
authors.lastname: Irwin
authors.forename: Anne
authors.initials: A
authors.lastname: McTiernan
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016009:Chi-Square Distribution; D016001:Confidence Intervals; D015444:Exercise / Q000502:physiology*; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology; D009140:Musculoskeletal Diseases / Q000453:epidemiology*; D009141:Musculoskeletal System / Q000293:injuries*; D009765:Obesity / Q000150:complications / Q000453:epidemiology; D016017:Odds Ratio; D010146:Pain / Q000453:epidemiology; D010147:Pain Measurement; D057185:Sedentary Behavior; D057566:Self Report; D013223:Statistics as Topic; D011795:Surveys and Questionnaires; D014481:United States / Q000453:epidemiology; D014947:Wounds and Injuries / Q000453:epidemiology*