Ankle Injuries and Disorders, Ankle Instability, Ankle Rehabilitation, Ankle Sprain
Conditions
Keywords
ankle evertors, ankle invertors, ankle joint, strength training, subtalar axis, peroneal muscles, tibial muscles, ankle sprains
Brief summary
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.
Interventions
BEHAVIORALAnkle Evertor and Invertor Strength Training
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.
Sponsors
University of Ljubljana
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
NONE
Eligibility
Sex/Gender
MALE
Age
18 Years to 50 Years
Healthy volunteers
Yes
Inclusion criteria
* Male, aged 18 to 50 Years * Recreationally active (regularly participating in running or sport) * No history of ankle injury or surgery * No musculoskeletal disorders affecting the lower extremity * Able to perform physical exercise without restrictions
Exclusion criteria
* History of ankle sprain or ligament injury in the past 12 months * Any lower extremity injury or surgery * Neurological or cardiovascular conditions affecting exercise participation * Currently receiving physiotherapy for lower extremity conditions
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Isometric Ankle Torque | Baseline and 12 weeks | Maximal isometric torque in foot eversion and inversion direction measured with a isometric device. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| EMG Activity of Tibial Muscles | Baseline and 12 weeks | Monitoring normalized RMS EMG amplitude of peroneus longus, peroneus brevis, tibialis anterior, gastrocnemius medialis, gastrocnemius lateralis, and soleus during different walking conditions. |
| Walking Speed | Baseline and 12 weeks | Monitoring walking speed (m/s) during three walking conditions. |
| Stretch Reflex Response | Baseline and 12 weeks | Electromyographic reflex response of ankle evertor (m. PL and PB) and invertor muscles (m TA) following mechanical perturbation. |
| Muscle Co-activation Index Between Pairs of Tibial Muscles During Walking | Baseline and 12 weeks | 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). |
| Foot Position During Walking | Baseline and 12 weeks | Monitoring foot elevation angle (degrees) during three different types of walking. |
| Contact Time | Baseline and 12 weeks | Monitoring contact time (s) during three different types of walking (flat surface, medially inclined laterally inclined). |
| Stride Length | Baseline and 12 weeks | Monitoring stride length (m) during three different types of walking (flat surface, medially inclined, laterally inclined). |
Countries
Slovenia
Contacts
STUDY_CHAIRAleš Dolenec, PhD
University of Ljubljana
PRINCIPAL_INVESTIGATORRok Bavdek, PhD
Outcome results
None listed