About this trial
This study will examine the overall capacity of people with Alzheimer's disease learning fall-resistant skills from perturbation training.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Participants must be at least 65 years old;
Participants have a clinical diagnosis of probable AD;
Participants can read and understand English;
Participants must be able to walk independently at least 25 feet;
Disqualifiers
Individuals have ever experienced perturbation training;
Individuals have hypotension or uncontrolled hypertension;
Individuals exhibit osteoporosis;
Participants suffer from coexisting psychiatric disorders, or other neurological conditions, or injuries, etc.
Trial design
Parallel
Treatments tested in this trial
Perturbation training
BehavioralParticipants will experience repeated perturbations mixed with non-perturbed trials on the treadmill with the protection by a harness.
Treatment groups
Trial outcomes
Primary outcomes
Lab-induced faller rate
The outcome of each perturbation trial will be determined as a fall if the peak load cell force exceeds 30% of the body weight. The load cell records the force applied to the human body by the safety harness system after a perturbation. The lab-induced faller rate will be calculated as the ratio of the number of fallers to the number of participants within each group.
Secondary outcomes
Dynamic stability
Dynamic stability will be calculated for each perturbation trial based on the kinematics of the body's center of mass relative to the base of support.
Number of prospective fall incident
The number of all cause falls in daily-living activities after the training session will be recorded for each participant.
Other outcomes
Berg Balance Scale
Berg balance scale will be used to objectively determine a participant' ability (or inability) to safely balance during a series of preset tasks. The score of the Berg Balance Scale is between 0 and 56 with a higher value indicating a better balance ability.
Mobility
Functional mobility will be assessed using the Timed-Up-and-Go test. The time used to complete the test will be recorded. The shorter the time, the better mobility.
Muscle strength
Strength capacity will be tested on the knee joint as the maximum strength the knee joint can produce. The measurement will be taken on an isokinetic dynamometer.
Pressure sensation level
The tactile sensation level at the dominant sole will be determined as the number of sites where the participant can feel the pressure produced by the monofilament.
Sponsors and contacts
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Georgia State University
Lead sponsor
National Institutes of Health (NIH)
Collaborator
Alzheimer's Association
Collaborator