title: Relations of meeting national public health recommendations for muscular strengthening activities with strength, body composition, and obesity: the Women's Injury Study.
abstract: OBJECTIVE
  We examined the relations of meeting or not meeting the 2008 Physical Activity Guidelines for Americans recommendations for muscular strengthening activities with percentage of body fat, body mass index (BMI; defined as weight in kilograms divided by height in meters, squared), muscular strength, and obesity classification in women.
  
  
  METHODS
  We analyzed data on 918 women aged 20 to 83 years in the Women's Injury Study from 2007 to 2009. A baseline orthopedic examination included measurement of height, body weight, skinfolds, and muscle strength.
  
  
  RESULTS
  Women who met muscle strengthening activity recommendations had significantly lower BMI and percentage of body fat and higher muscle strength. Women not meeting those recommendations were more likely to be obese (BMI ≥ 30) compared with women who met the recommendations after we adjusted for age, race, and aerobic physical activity (odds ratio = 2.28; 95% confidence interval = 1.61, 3.23).
  
  
  CONCLUSIONS
  There was a small but significant positive association between meeting muscle strengthening activity recommendations and muscular strength, a moderate inverse association with body fat percentage, and a strong inverse association with obesity classification, providing preliminary support for the muscle strengthening activity recommendation for women.
authors.affiliation: School of Physical Therapy, Texas Woman’s University, 8194 Walnut Hill Lane, Dallas, TX 75231, USA. ejackson@twu.edu
authors.forename: Elaine
authors.initials: E
authors.lastname: Trudelle-Jackson
authors.forename: Allen W
authors.initials: AW
authors.lastname: Jackson
authors.forename: James R
authors.initials: JR
authors.lastname: Morrow
mesh_terms: D000273:Adipose Tissue; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001823:Body Composition; D015992:Body Mass Index; D016001:Confidence Intervals; D005260:Female; D006801:Humans; D016015:Logistic Models; D008875:Middle Aged; D009043:Motor Activity; D053580:Muscle Strength; D009141:Musculoskeletal System / Q000293:injuries; D009765:Obesity / Q000209:etiology / Q000517:prevention & control*; D016017:Odds Ratio; D010809:Physical Fitness; D017410:Practice Guidelines as Topic; D055070:Resistance Training; D055815:Young Adult