title: Balance and strength training in older adults: intervention gains and Tai Chi maintenance.
abstract: OBJECTIVE
  To determine the effect on balance and strength of 3 months of intensive balance and/or weight training followed by 6 months of low intensity Tai Chi training for maintenance of gains.
  
  
  METHODS
  Randomized control intervention. Four groups in 2 x 2 design: Control, Balance, Strength, Balance + Strength, using blinded testers.
  
  
  METHODS
  Exercise and balance laboratory at University of Connecticut Health Center.
  
  
  METHODS
  Subjects were 110 healthy community dwellers (mean age 80) who were free of dementia, neurological disease, and serious cardiovascular or musculoskeletal conditions.
  
  
  METHODS
  Short-term training (3 months) occurred 3 times/week (45 minutes Balance and Strength, 90 minutes Balance + Strength). Balance training included equilibrium control exercises of firm and foam surfaces and center-of-pressure biofeedback. Strengthening consisted of lower extremity weight-lifting. All subjects than received long-term group Tai Chi instruction (6 months, 1 hour, 1 time/week).
  
  
  METHODS
  Losses of balance during Sensory Organization Testing (LOB), single stance time (SST), voluntary limits of stability (FBOS), summed isokinetic torque of eight lower extremity movements (ISOK), and usual gait velocity (GVU).
  
  
  CONCLUSIONS
  Balance training meaningfully improved all balance measures by restoring performance to a level analogous to an individual 3 to 10 years younger: LOB = -2.0 +/- 0.3 (adjusted paired differences, P < .005 ANOVA); SST = 7.0 +/- 1.2 sec; and FBOS = 9.0 +/- 2.0% of foot length (P < .05). Strengthening increased ISOK by 1.1 +/- 0.1 Nm kg-1 (P < .005). There was no interaction between balance and strength training. Significant gains persisted after 6 months of Tai Chi, although there was some decrement.
authors.affiliation: Department of Neurology, University of Connecticut School of Medicine, Hartford, USA.
authors.forename: L
authors.initials: L
authors.lastname: Wolfson
authors.forename: R
authors.initials: R
authors.lastname: Whipple
authors.forename: C
authors.initials: C
authors.lastname: Derby
authors.forename: J
authors.initials: J
authors.lastname: Judge
authors.forename: M
authors.initials: M
authors.lastname: King
authors.forename: P
authors.initials: P
authors.lastname: Amerman
authors.forename: J
authors.initials: J
authors.lastname: Schmidt
authors.forename: D
authors.initials: D
authors.lastname: Smyers
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001696:Biomechanical Phenomena; D005260:Female; D005684:Gait; D015577:Geriatric Assessment; D006304:Health Status; D006801:Humans; D008297:Male; D016139:Martial Arts / Q000502:physiology*; D004856:Postural Balance; D016896:Treatment Outcome; D014891:Weight Lifting