title: Effects of a dairy supplement and resistance training on lean mass and insulin-like growth factor in women.
abstract: OBJECTIVE
  To examine the effect of yogurt supplementation pre- and postexercise on changes in body composition in overweight women engaged in a resistance-training program.
  
  
  METHODS
  Participants (age = 36.8 ± 4.8 yr) with a body-mass index of 29.1 ± 2.1 kg/m2 were randomized to yogurt supplement (YOG; n = 15) or isoenergetic sucrose beverage (CONT; n = 14) consumed before and after exercise for 16 wk. Participants were also instructed to reduce energy intake daily (-1,046 kJ) during the study. Body composition was assessed by dual-energy X-ray absorptiometry, waist circumference, and sagittal diameter. Strength was measured with 1-repetition maximum. Dietary recalls were obtained by a multipass approach using Nutrition Data System software. Insulin-like growth factor-1 and insulin-like growth-factor-binding protein-3 were measured with ELISA.
  
  
  RESULTS
  Significant weight losses of 2.6 ± 4.5 kg (YOG) and 1.2 ± 2.5 kg (CONT) were observed. Total lean weight increased significantly over time in both YOG (0.8 ± 1.2 kg) and CONT (1.1 ± 0.9 kg). Significant reductions in total fat (YOG = 3.4 ± 4.1 kg vs. CONT = 2.3 ± 2.4 kg) were observed over time. Waist circumference, sagittal diameter, and trunk fat decreased significantly over time without group differences. Both groups significantly decreased energy intake while maintaining protein intake. Strength significantly increased over time in both groups. No changes over time or between groups were observed in hormone levels.
  
  
  CONCLUSIONS
  These data suggest that yogurt supplementation offered no added benefit for increasing lean mass when combined with resistance training and modest energy restriction.
authors: University of Kentucky, Lexington, KY, USA.
authors: David Travis
authors: DT
authors: Thomas
authors: Laurie
authors: L
authors: Wideman
authors: Cheryl A
authors: CA
authors: Lovelady
mesh_terms: D015502:Absorptiometry, Photon; D000273:Adipose Tissue / Q000378:metabolism*; D000328:Adult; D001628:Beverages; D001823:Body Composition; D015992:Body Mass Index; D015930:Diet Records; D004038:Diet, Reducing / Q000379:methods; D019587:Dietary Supplements; D002149:Energy Intake; D004797:Enzyme-Linked Immunosorbent Assay; D015444:Exercise; D005260:Female; D006801:Humans; D018972:Insulin-Like Growth Factor Binding Protein 3 / Q000097:blood; D007334:Insulin-Like Growth Factor I / Q000378:metabolism*; D053580:Muscle Strength; D050177:Overweight / Q000097:blood / Q000000981:diagnostic imaging; D055070:Resistance Training; D013395:Sucrose / Q000008:administration & dosage; D055105:Waist Circumference; D015431:Weight Loss; D016387:Women's Health; D015014:Yogurt
chemical_list: D018972:Insulin-Like Growth Factor Binding Protein 3; D013395:Sucrose; D007334:Insulin-Like Growth Factor I