In de studies die hier voorliggen worden de effecten van normale veroudering onderzocht. ageing old age
Conditions
Interventions
In studies 1 and 2 a computer-controlled split-belt treadmill (M-Gait
Motek,
Amsterdam, NL) will be used. The belt movement can be reversed with a high
acceleration to induce slip-like perturbations. Belt-speed will be set to -1.2
m/s in both studies.
In study 1, 2
200 strides). During the *perturbation phase* (phase III), a series of 30
slip-like perturbations will be presented to the right leg (10-12 minutes).
During the *washout phase* (phase IV
210 strides), no more perturbations will
be presented, but the participants will not be informed about this.
In study 2, 20 healthy young (18-30) participants and 20 healthy older (65-80)
participa
Sponsors
Universitair Medisch Centrum Groningen
Eligibility
Age
18 Years to 99 Years
Inclusion criteria
Inclusion criteria: 1. Participant is healthy 2. Is able to walk for 30 minutes without problems 3. Meets the age requirements at the time of inclusion (18-30 or 65-80)
Exclusion criteria
Exclusion criteria: 1. Neurological, orthopedic, visual, sensorimotor, vestibular or other impairments and injuries that are known to affect walking and/or balance 2. Participants should not have any prior experience with similar experimental paradigms 3. Recent hip or knee arthroplasty ( 30 5. For study 2 only: participation in study 1
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| 1. Normalized step length: Defined as the distance between centers of pressure (CoP) of the feet at initial foot contact, normalized for leg length. 2. Normalized step time: defined as the time between two subsequent initial foot contacts, normalized for leg length. 3. Step width: defined as the absolute difference between the local minimum/ maximum CoP position during the consecutive contralateral single support phases of each stride. 4. Step length ratio, defined as (step length left - step length right)/ (step length left + step length right). 5. Step time ratio, defined as (step time left - step time right)/ (step time left + step time right). 6. Margin of Stability, defined as the distance between the extrapolated centre of mass (XCoM) and the CoP at contralateral foot lift. The XCoM is defined as CoM (i.e. the Centre of Mass) + VCoM*W0, where VCoM is the instantaneous velocity of the CoM and W0 is the gravitational acceleration. | — |
Secondary
| Measure | Time frame |
|---|---|
| 1. Falls efficacy scale international 2. Perceived physical activity 3. Dutch General Self-efficacy Scale | — |
Countries
Netherlands
Outcome results
None listed