Prevention of ACL injuries
Conditions
Interventions
Two types of immediate feedback will be given:
Explicit feedback: After performing the sidestep cutting manoeuvres, subjects will immediately receive explicit instructions to improve their performanc
2. Decreased knee flexion angle
3. Increased anterior tibial shear force
4. Decreased hip flexion angle
5. Increased hip internal rotation angle
6. Increased knee internal rotation angle.
Items to improve these potential risk factors above will be mentioned to the subjects and subjects will be requested to minimise the load at the knee.
Imp
they explore and then select the performance which fits best.
Sponsors
University Medical Center Groningen
Center for Human Movement Sciences
University of Groningen
Eligibility
Inclusion criteria
Inclusion criteria: 1. 18 years or older; 2. Playing basketball at the highest recreational level; 3. No history of major lower extremity injury or surgery; 4. No current or recent (6 months) injury to the entire lower extremity; 5. Able to participate in training and games for 100% at time of testing.
Exclusion criteria
Exclusion criteria: 1. Any hip, knee or other relevant injury in the last 6 months prior to testing; 2. Any relevant previous injury or surgery at any joint of the lower extremity; 3. Any history of neurological, vestibular or visual impairment.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The primary outcome measurements will be as follows: 1. Average EMG pattern of the gluteus maximus (GM), vastus medialis (VM), vastus lateralis (VL), medial hamstring (MH), lateral hamstring (LH), medial gastrocnemius (MG) and lateral gastrocnemius (LG); 2. Muscle onset time (ie. the first burst in EMG as detected by the Santello algoritm prior to landing [68]) of the GM, VM, VL, MH, LH, MG and LG; 3. Muscle activity of the GM, VM, VL, MH, LH, MG and LG integrated over the interval from 100 milliseconds prior to foot contact to foot contact (preparatory interval) and from foot contact to the point of peak knee flexion (weight acceptance); 4. Muscle co-contraction (ie. using the integrated EMG of each muscle and the formula: [(less active muscle/more active muscle) X (sum of the integrated activity of both muscles)]73) of VL-MG, VL-LH, VM-LG and VM-MH over the interval from 100 milliseconds prior to foot contact to foot contact (preparatory interval) and from foot contact to the point of peak knee flexion (weight acceptance); 5. Hip, knee and ankle angles at IC, peak posterior GRF and the maximum values for each of those variables: A. Abduction / adduction; B. Flexion / extension; C. External / internal rotation (only for hip and knee); D. Knee angular displacement flexion angle. 6. Joint moments of hip, knee and ankle at IC, peak posterior GRF and the maximum values for each of those variables: A. Abduction / adduction; B. Flexion / extension; C. External / internal rotation (only for hip and knee). 7. Peak vertical GRF (normalized to body weight); 8. Peak proximal anterior tibial shear force (normalized to body weight). | — |
Secondary
| Measure | Time frame |
|---|---|
| 1. The history on injuries and / or surgeries; 2. The Tegner activity level questionnaire; 3. Activity between intervention and follow up tests. | — |
Contacts
Public ContactAnne Benjaminse
Antonius Deusinglaan 1
Outcome results
None listed