Effects of Ankle Support on Muscle Activation and Function

Previous research has demonstrated improved dynamic balance following the application of
fibular taping. The effects of fibular taping on ankle dorsiflexion ROM and muscle
activation in individuals with CAI are unknown. The purpose of this study is to determine
the acute effects of fibular taping on muscle activation of the fibularis longus (peroneus)
and soleus muscles, ankle dorsiflexion range of motion (ROM) and dynamic balance. The
investigators hypothesize that fibular taping will have similar effectiveness as
mobilization interventions which have been shown to improve muscle activation, ankle
dorsiflexion ROM,and dynamic balance. Outcomes will be measured immediately before and after
intervention. A crossover design will be used and participants will complete two visits at
least 48 hours apart, but not more than 1 week apart. After participants complete both arms
of the study their participation will be complete (average time to completion for each
subject is 1 week).

Inclusion Criteria:

- Age 16-45 years

- History of one or more ankle sprains

- Scoring at least an 85% on the Foot and Ankle Ability Measure (FAAM) Sport or at
least 3 on the Modified Ankle Instability Instrument (AII).

- At least 5° ankle dorsiflexion asymmetry compared to the contralateral limb OR ankle
dorsiflexion ROM less than 21°

Exclusion Criteria:

- Lower extremity injury or surgery within the past 6 months (including lateral ankle
sprain)

- Diagnosed ankle osteoarthritis

- History of ankle surgery that involves intra-articular fixation

- Potential for current pregnancy