title: Effects of 4 weeks of elastic-resistance training on ankle-evertor strength and latency.
abstract: BACKGROUND
  Several researchers have suggested that improving evertor strength and peroneus longus reaction time may help alleviate the symptoms of chronic ankle instability and reduce the rate of recurrent ankle sprains.
  
  
  OBJECTIVE
  To determine the effectiveness of a 4-wk elastic-resistance exercise-training program on ankleevertor strength and peroneus longus latency in subjects with and without a history of ankle sprains (HAS).
  
  
  METHODS
  Randomized controlled clinical trial.
  
  
  METHODS
  40 subjects (20 male, 20 female; 20 HAS, 20 healthy). Ten subjects (5 male and 5 female) from each of the HAS and healthy groups were randomly assigned to exercise or control groups.
  
  
  METHODS
  4-directional elastic-resistance exercise training 2 times/wk for 4 wk.
  
  
  METHODS
  Ankle-evertor strength and peroneal muscle latency after sudden inversion were measured before training, after 4 wk of training, and 4 wk posttraining.
  
  
  RESULTS
  Four weeks of elastic-resistance exercise training did not elicit significant changes in 1-repetition-maximum ankleevertor strength between the exercise and control groups (P = .262), HAS and healthy groups (P = .329), or males and females (P = .927). Elastic-resistance exercise training did not elicit significant changes in peroneus longus muscle latency between the exercise and control groups (P = .102), HAS and healthy groups (P = .996), or males and females (P = .947).
  
  
  CONCLUSIONS
  The 4-wk elastic-resistance exercise training had no effect on ankle-evertor strength and reflex latency of the peroneus longus after unexpected ankle inversion.
authors.affiliation: Dept of Kinesiology, San José State University, San José, CA, USA.
authors.forename: Kyungmo
authors.initials: K
authors.lastname: Han
authors.forename: Mark D
authors.initials: MD
authors.lastname: Ricard
mesh_terms: D000704:Analysis of Variance; D016512:Ankle Injuries / Q000503:physiopathology / Q000517:prevention & control*; D004548:Elasticity; D004576:Electromyography; D005260:Female; D006801:Humans; D007593:Joint Instability / Q000503:physiopathology / Q000517:prevention & control*; D016014:Linear Models; D008297:Male; D053580:Muscle Strength / Q000502:physiology; D012026:Reflex, Stretch / Q000502:physiology; D015203:Reproducibility of Results; D055070:Resistance Training / Q000379:methods*; D013180:Sprains and Strains / Q000503:physiopathology / Q000517:prevention & control*; D016896:Treatment Outcome; D055815:Young Adult