Chronic ankle instability was determined by the Identification of Functional Ankle Instability Questionnaire , and participants were randomly assigned to a resistance-band-protocol group ( n = 13 [ 33 % ] age = 19.7 2.2 years , height = 172.9 12.8 cm , weight = 69.1 13.5 kg ) , a proprioceptive neuromuscular facilitation strength-protocol group ( n = 13 [ 33 % ] , age = 18.9 1.3 years , height = 172.5 5.9 cm , weight = 72.7 14.6 kg ) , or a control group ( n = 13 [ 33 % ] , age = 20.5 2.1 years , height = 175.2 8.1 cm , weight = 70.2 11.1 kg ) .