title: Relationship between protein intake and dynapenia in postmenopausal women.
abstract: OBJECTIVE
  The purpose of this study was to investigate the relationship between protein intake and dynapenia.
  
  
  METHODS
  A cross-sectional/observational study.
  
  
  METHODS
  Department of Kinanthropology at the University of Quebec at Montreal.
  
  
  METHODS
  Seventy-two non-frail postmenopausal women aged between 50 to 75 years were recruited.
  
  
  METHODS
  Body weight (BW), lean body mass (LBM; %) and skeletal muscle mass (bio-electrical impedancemetry analysis), maximum voluntary handgrip strength (using hand dynamometer), aerobic capacity (VO2peak) and dietary intake were measured. Women were divided according to dynapenia criteria.
  
  
  RESULTS
  The strongest correlation between muscle strength and protein intake was observed when we express the amount of protein in g/d/BW. No differences for age, BMI, status of menopause, fat mass and VO2peak were observed between non-dynapenic, type I dynapenic and type II dynapenic women, independently of the criteria used. We observed significant differences in protein intake (g/d/BW) between non-dynapenic and type II dynapenic (p<0.01) as well as between type I dynapenic and type II dynapenic (p<0.01) when dynapenia was expressed in kg/BW and in kg/LBM, respectively. It should be noted that no differences in LBM between the three groups were observed when dynapenia was expressed in kg/BW and kg/LBM. Protein intake for all groups respected the RDA of 0.8 to 1.2 g/d/BW (non-dynapenic: 1.44/1.38; type I dynapenic: 1.30/1.33; type II dynapenic: 1.05/1.08 g/d/BW).
  
  
  CONCLUSIONS
  Protein intake seems to play a role in the development of dynapenia particularly at the level of type II dynapenia. Therefore, an increase in the recommended daily allowance for protein intake may be warranted.
authors: Faculty of Science, Department of Kinanthropolgy, University of Quebec at Montreal, Case postale 8888, succ Centre Ville, Montreal, Canada.
authors: M E
authors: ME
authors: Filion
authors: S
authors: S
authors: Barbat-Artigas
authors: S
authors: S
authors: Dupontgand
authors: A
authors: A
authors: Fex
authors: A D
authors: AD
authors: Karelis
authors: M
authors: M
authors: Aubertin-Leheudre
mesh_terms: D000368:Aged; D001823:Body Composition / Q000502:physiology; D015992:Body Mass Index; D001835:Body Weight; D003430:Cross-Sectional Studies; D004044:Dietary Proteins / Q000008:administration & dosage*; D005260:Female; D018737:Hand Strength; D006801:Humans; D008875:Middle Aged; D053580:Muscle Strength / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology; D018673:Nutrition Policy; D017698:Postmenopause / Q000502:physiology*; D011792:Quebec
chemical_list: D004044:Dietary Proteins