The aim of this study was to investigate the effects of a 12-week ankle evertor and invertor strength training program performed on a specially designed device, which allows isolated strengthening of evertor and invertor muscles. Outcome measures included isometric ankle torque, EMG activity of six tibial muscles, muscle coactivation, and kinematic parameters during three walking conditions. This trial was retrospectively registered. The study was conducted in 2017 as part of a doctoral dissertation at the Faculty of Sport, University of Ljubljana, prior to the authors' awareness of prospective registration requirements.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Enrollment
32
Participants in experimental group were performing strength training on a specially designed device. The program consisted of 8 weeks of hypertrophy-oriented training followed by 4 weeks of neural activation training.
Faculty of Sport, University of Ljubljana
Ljubljana, Slovenia
Isometric Ankle Torque
Maximal isometric torque in foot eversion and inversion direction measured with a isometric device.
Time frame: Baseline and 12 weeks
EMG Activity of Tibial Muscles
Monitoring normalized RMS EMG amplitude of peroneus longus, peroneus brevis, tibialis anterior, gastrocnemius medialis, gastrocnemius lateralis, and soleus during different walking conditions.
Time frame: Baseline and 12 weeks
Walking Speed
Monitoring walking speed (m/s) during three walking conditions.
Time frame: Baseline and 12 weeks
Stretch Reflex Response
Electromyographic reflex response of ankle evertor (m. PL and PB) and invertor muscles (m TA) following mechanical perturbation.
Time frame: Baseline and 12 weeks
Muscle Co-activation Index Between Pairs of Tibial Muscles During Walking
Coactivation index (%) calculated between pairs of tibial muscles (PL, PB, TA, SOL, GM, GL) during three different types of walking (normal walking, medially inclined, laterally inclined surface).
Time frame: Baseline and 12 weeks
Foot Position During Walking
Monitoring foot elevation angle (degrees) during three different types of walking.
Time frame: Baseline and 12 weeks
Contact Time
Monitoring contact time (s) during three different types of walking (flat surface, medially inclined laterally inclined).
Time frame: Baseline and 12 weeks
Stride Length
Monitoring stride length (m) during three different types of walking (flat surface, medially inclined, laterally inclined).
Time frame: Baseline and 12 weeks
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