Cognitive Disorder, Gait Disorder, Sensorimotor
Conditions
Keywords
gait speed, cognitive processing speed
Brief summary
The purpose of this research study is to compare two different exercise treatments for walking problems in older adults. The investigators want to determine if participation in the exercise programs will improve walking and thinking abilities.
Detailed description
Specific Aims We will examine the impact of moderate intensity aerobic and of motor skill exercise interventions on improving gait and cognition in older adults with slow gait and psychomotor slowing. In a thrice weekly, 12 week, randomized clinical trial, we propose the following aims: 1) to define the impact of moderate intensity aerobic and motor skill gait exercise on thinking while walking, and 2) to define the impact of moderate intensity aerobic and motor skill gait exercise on gait and cognition. Brief Background The optimal exercise to improve gait and brain health in older adults is not known. Two types of exercise with potential for affects on gait and brain health, aerobic and motor skill exercise, developed out of distinct disciplines and have been studied separately, but not in older adults with the same age-related, centrally-generated slow gait dysfunction or for their effects on an integrated measure of gait and cognition, 'walking while thinking'. Summary of Methods We propose two parallel, single arm clinical trials to define the impact of aerobic and motor-skill exercise on gait and cognitive functions, in community-dwelling older adults with slow gait and psychomotor slowing, randomly assigned to moderate intensity aerobic gait (n=12) or motor skill gait (n=12) exercise, three times a week, for 12 weeks, in small groups of 2-3 supervised by a physical therapist. Primary outcomes are integrated measures of thinking while walking, with secondary outcomes of specific measures of gait and cognitive function collected pre, 4, 8 and 12 weeks post interventions, to examine impact of exercise and dose-response effects on gait and cognition. Future Use of Data The intent of the proposed pilot is to generate complementary data essential to support an R01 clinical trial grant submission. Specifically in this pilot we will: 1) recruit older adults with both slow gait speed and evidence of psychomotor slowing, 2) explore and define a primary outcome measure that integrates both gait and cognition, and thus better represents the goal of the exercise interventions - thinking while walking, 3) determine potential mean and variability estimates for gait and cognitive outcomes, particularly the less well-characterized gait outcomes of aerobic exercise (energy expenditure for walking, gait variability, gait abnormalities), and cognitive outcomes of motor skill exercise (speed of processing, executive function).
Interventions
BEHAVIORALmotor skill gait exercise
The motor skill gait exercise is a task-oriented motor sequence learning approach to exercise to improve walking. The approach involves goal-directed stepping and walking patterns to facilitate use of the appropriate muscles at the appropriate timing relative to body position during gait through the task performance. Treadmill-assisted walking in brief intervals of small increased speed walking interspersed with usual walking speed are performed to induce the automatic rhythm and timing of gait. The exercise sessions are about 60 minutes, 2-3 times a week for 12 weeks or a total of 30-36 sessions.
BEHAVIORALaerobic gait intervention
The aerobic gait intervention approach involves treadmill and overground walking with the gradual increases in the distance walked and speed of walking. The exercise approach provides walking practice, including on the treadmill to facilitate the timing of stepping during gait, while also facilitating a fitness or conditioning response, and endurance for walking activities. The exercise sessions are about 60 minutes, 2-3 times weekly for 12 weeks, or about 30-36 sessions.
Sponsors
National Institute on Aging (NIA)
University of Pittsburgh
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
65 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* slow gait speed (\<= 1.0m/s and \>= .6m/s) * slow cognitive processing (digit symbol substitution \< age-adjusted norm * medical clearance from primary physician for participation in exercise
Exclusion criteria
* dementia or Mild Cognitive Impairment MCI * pain while walking that limits walking * active medical conditions, not controlled or managed
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| integrated measure of thinking while walking | 12 weeks | The outcome measure is a cognitive task such as working memory, visual-spatial orientation, and set shifting measures of cognitive function performed while walking over an oval track. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| gait | 12 weeks | energy cost of walking, gait smoothness, gait speed and spatial and temporal gait characteristics under usual and challenging gait conditions, gait abnormalities, and walking endurance |
Countries
United States
Outcome results
None listed