S86.0
Conditions
Interventions
Group 1: Healthy study subjects walk with the Künzli Ortho Rehab Absolut, Orthotech Vario-Stabil and OPED Vacuped Achill at a constant speed and at a standardized speed.
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Sponsors
Zürcher Hochschule für Angewandte Wissenschaften
Eligibility
Sex/Gender
All
Age
18 Years to 60 Years
Inclusion criteria
Inclusion criteria: - Informed Consent as documented by signature - Age: 18 – 60 years - Body mass index: 18 – 28 kg/m2 Patient group only: - Currently wearing VACOped, Orthotech Vario-Stabil, or Künzli Ortho Rehab Absolut following Achilles tendon injury - Walk without crutches, full-weight bearing allowed
Exclusion criteria
Exclusion criteria: - Women who are pregnant or breast feeding - Previous enrolment into the current study - Enrolment of employees and other dependent persons associated with the investigational product or control product - Acute or chronic musculoskeletal diseases (except Achilles tendon injury for patient group) - Acute or chronic cardiovascular diseases - Acute or chronic neurological disease Control group only - Previous Achilles tendon injury
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The primary study objective is the comparison of ground reaction forces and ankle kinematics and kinetics during walking with different stable footwear used during rehabilitation of Achilles tendon injuries. The kinematics of the ankle joint are derived from 3d optoelectronic motion capture and anthropometrical measurements. The anthropometrics to be measured are total body weight and height. For the 3d optoelectronic measurements, markers, which reflect the infrared light emitted by the motion tracking cameras, will be placed on defined anatomical landmarks, according to a customized cluster marker model. 3d positions of the markers in space are reconstructed from the 2-D images from 12 motion tracking cameras. From those positions 3d joint kinematics will be calculated (Vicon Nexus Software V2.6, and Matlab 2017a). This data will be captured at 200Hz. Subjects will perform walking at self-selected speed as well as at a standardized speed (1.5 m/s). 10 correct trials, where one foot is entirely on one force plate will be recorded for the right and left side. Walking speed is measured with light barriers (MicroGate, Bozen, Italy), placed in a known distance. For the estimation of the kinetics (the biomechanical (net-) joint torque) at the ankle joint we will use standard linked segment modelling and inverse dynamics. The input variables for this biomechanical model concern the ground reaction forces, measured with two AMTI force plates (2000Hz), the kinematics of body segments derived from 3-D optoelectronic motion capture (Vicon) and anthropometrical measurements. | — |
Secondary
| Measure | Time frame |
|---|---|
| The first secondary objective is the comparison of knee and hip kinematics and kinetics during walking with different stable footwear used during rehabilitation of Achilles tendon ruptures. Furthermore, gait parameters for the different footwear are compared. As gait parameters, step length and self-selected walking speed are measured. Step length will be measured by marker data, as described under 5.1. Walking speed is measured by light barriers placed in a known distance. Differences between the footwear are of interest. Another secondary objective is the assessment of comfort, usability, and practicability of different stable footwear used during rehabilitation of Achilles tendon ruptures in daily living. This is examined with questionnaires. | — |
Countries
Switzerland
Contacts
Public ContactBettina;Eveline Sommer;Graf
Zürcher Hochschule für Angewandte Wissenschaften;Zürcher Hochschule für Angewandte Wissenschaften
Outcome results
None listed