title: Effects of different doses of high-speed resistance training on physical performance and quality of life in older women: a randomized controlled trial.
abstract: OBJECTIVE
  This study aimed to compare the effects of two frequencies of high-speed resistance training (HSRT) on physical performance and quality of life of older women.
  
  
  METHODS
  A total of 24 older women participated in a 12-week HSRT program composed of either two or three sessions/week (equated for volume and intensity). Women were randomized into three arms: a control group (CG, n=8), a resistance training group performing two sessions/week (RT2, n=8), and a resistance training group performing three sessions/week (RT3, n=8). The training program for both experimental groups included exercises that required high-speed concentric muscle actions.
  
  
  RESULTS
  No baseline differences were observed among groups. Compared with the CG, both training groups showed similar small to moderate improvements (P<0.05) in muscle strength, power, functional performance, balance, and quality of life.
  
  
  CONCLUSIONS
  These results suggest that equated for volume and intensity, two and three training sessions/week of HSRT are equally effective for improving physical performance and quality of life of older women.
authors.affiliation: Department of Physical Activity Sciences; Laboratory of Measurement and Assessment in Sports, Research Nucleus in Health, Physical Activity and Sports, Universidad de Los Lagos, Osorno; Unit of Integrative Physiology, Laboratory of Exercise Sciences, MEDS Clinic, Santiago, Chile.
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Ramirez-Campillo
authors.affiliation: School of Occupational Therapy, Faculty of Health, Universidad Santo Tomás, Osorno.
authors.forename: Daniela
authors.initials: D
authors.lastname: Diaz
authors.affiliation: Department of Physical Education, Sport and Recreation, Universidad de La Frontera.
authors.forename: Cristian
authors.initials: C
authors.lastname: Martinez-Salazar
authors.affiliation: Institute of Physical Activity and Health, Universidad Autónoma de Chile, Temuco.
authors.forename: Pablo
authors.initials: P
authors.lastname: Valdés-Badilla
authors.affiliation: Department of Physical Education, Sport and Recreation, Universidad de La Frontera.
authors.forename: Pedro
authors.initials: P
authors.lastname: Delgado-Floody
authors.affiliation: School of Kinesiology, Faculty of Health, University Santo Tomás, Talca.
authors.forename: Guillermo
authors.initials: G
authors.lastname: Méndez-Rebolledo
authors.affiliation: Laboratory of Physiology, Department of Biological Sciences, Faculty of Biological Sciences, Universidad Andres Bello, Viña del Mar; School of Kinesiology, Faculty of Medicine, Universidad Diego Portales, Santiago.
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Cañas-Jamet
authors.affiliation: IRyS Group, Physical Education School, Pontificia Universidad Católica de Valparaíso, Valparaíso.
authors.forename: Carlos
authors.initials: C
authors.lastname: Cristi-Montero
authors.affiliation: Laboratory of Physical Activity Sciences, Sport and Health, Faculty of Medical Sciences, Universidad de Santiago de Chile, USACH, Santiago, Chile.
authors.forename: Antonio
authors.initials: A
authors.lastname: García-Hermoso
authors.affiliation: BHF Glasgow Cardiovascular Research Centre, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow.
authors.forename: Carlos
authors.initials: C
authors.lastname: Celis-Morales
authors.affiliation: Centre for Sports and Exercise Science, School of Biological Sciences, University of Essex, Colchester, UK.
authors.forename: Jason
authors.initials: J
authors.lastname: Moran
authors.affiliation: Department of Aging and Geriatric Research, Institute of Aging, University of Florida, College of Medicine, Gainesville, Florida, USA.
authors.forename: Thomas W
authors.initials: TW
authors.lastname: Buford
authors.affiliation: Division of Geriatric Medicine, University Hospital of Getafe, Madrid.
authors.forename: Leocadio
authors.initials: L
authors.lastname: Rodriguez-Mañas
authors.affiliation: Department of Health Sciences, Public University of Navarre, Navarre, Spain.
authors.forename: Alicia M
authors.initials: AM
authors.lastname: Alonso-Martinez
authors.affiliation: Department of Health Sciences, Public University of Navarre, Navarre, Spain.
authors.forename: Mikel
authors.initials: M
authors.lastname: Izquierdo
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D015577:Geriatric Assessment; D006801:Humans; D008875:Middle Aged; D053580:Muscle Strength / Q000502:physiology*; D004856:Postural Balance; D011788:Quality of Life; D055070:Resistance Training / Q000379:methods*
keywords: adaptation; aging; frailty; muscle strength