Physical Disability
Conditions
Keywords
Occupational Therapy, Exercise
Brief summary
The goal of the study is to improve cardiometabolic health outcomes for wheelchair users and identify strategies for achieving sufficient physical activity intensity during bouts of structured physical activity.
Detailed description
Wheelchair users have a higher risk for obesity and cardiometabolic health-related diseases compared to persons without a disability and remain one of the most sedentary populations in the United States. Engaging wheelchair users in physical activity levels following the current recommendations to achieve cardiometabolic health-related changes requires tailoring and supports in an accessible community environment, but it is unclear if a community-based physical activity intervention that also prioritizes intensity levels is best to improve cardiometabolic health. This project will determine the effects and implementation outcomes of a community-based, intensity-controlled aerobic and strength training intervention on the cardiometabolic health of wheelchair users and will significantly advance public health knowledge of how to engage wheelchair uses in physical activity to reverse or prevent cardiometabolic health-related disease. The aims of the study are to: 1. Compare the effectiveness of the intensity-controlled physical activity training (IPAT) group to the education and access (EA) group for improving cardiometabolic-related health outcomes. 2. Identify barriers and facilitators to wheelchair users engaging in physical activity at a community-based accessible gym. 3. Examine the moderators (i.e., age, race, gender, duration of disability, wheelchair type, and physical function) and mediators (ie., self-efficacy, motivation, and barriers/facilitators) of the proposed intervention to understand for whom and how the intervention was effective. A hybrid I RCT will be conducted. One hundred and ten individuals with a physical disability requiring the use of a wheelchair will be recruited. Each participant will be randomized into either a 14-week IPAT group (n=54) or a 14-week EA group (n=54). Participants' cardiorespiratory, body composition, metabolic blood chemistries and strength will be assessed baseline (T1) and post intervention (T2).
Interventions
BEHAVIORALIntensity-controlled physical activity training (IPAT)
The IPAT group will receive 40 (90 minute) one-on-one, intensity-controlled, exercise sessions by trained staff over 14 weeks. The initial 2-week period will include dedicated education on topics including physical activity guidelines and the benefits of achieving them, the feeling of moderate-to-vigorous physical activity intensity levels, and the appropriate exercises for achieving desired intensity levels. Tailored sessions will be created for each participant based on their physical fitness, goals, preferred exercise equipment and results from their baseline assessment. Each session can include vitals, pain assessment, warm-up, aerobic training, strength exercises and a cool-down. The participants will be monitored to ensure they are achieving at least 150 minutes of moderate-to-vigorous intensity physical activity weekly. Heart rate and actigraphy monitors will be worn during sessions to capture exercise intensity data. The overall goal is to improve cardiorespiratory fitness.
BEHAVIORALEducation and Access (EA)
The EA group will receive an initial 60 minute educational session, during which they will receive information on the adapted exercise equipment in the Orthwein Center, education on the physical activity guidelines and the health benefits of achieving them, and access to the Orthwein Center accessible gym. They will then complete a 14-week independent workout program with the goal of meeting physical activities guidelines. They will have access to Orthwein Center staff to help with minimal setup and guidance, but sessions will be self-directed. Heart rate and actigraphy monitors will be worn during sessions to capture exercise intensity data. Participants will be asked to complete a log for each session to report pain, details of the activities they completed during their workout, the RPE for each activity, and how long each activity lasted.
Sponsors
Washington University School of Medicine
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Age 18 years or older * Has a physical disability requiring the use of a wheelchair (includes manual wheelchairs, motorized wheelchairs, motor-assisted wheelchairs, and electric scooters) * Ability to attend weekly exercise sessions in person * Ability to independently move one or both upper extremities * Has participated in no more than 60 minutes of moderate-intensity physical activity per week in the past month * English-speaking * Able to provide informed consent * Ability to complete a valid V02max score with 2 attempts
Exclusion criteria
* Determination by their physician to be medically unstable * Has had cardiovascular complications within the past year or unstable heart disease * Currently receiving medical treatment for an acute injury * Presence of a stage IV pressure injury * Currently pregnant or suspect pregnancy
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| VO2max - Cardiorespiratory Fitness change (Max Oxygen Consumption Change in ml/kg/min) | Baseline and up to 3 weeks post intervention | VO2max will be measured in ml/kg/min using a portable, breath-by-breath metabolic system with an optoelectronic reader, as well as reliable highly linear and rapid response O2 and CO2 sensors (COSMED K5, COSMED: The Metabolic Company, Chicago, IL). This testing will be completed while the participant performs a graded-exercise test on a crank ergometer (SCIFIT PRO2, Life Fitness, Tulsa, OK). The protocol involves a 3-minute warm-up followed by a standard ramp-up protocol which is typically completed in 8-12 minutes, and a subsequent 5-minute recovery phase. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| DEXA - Body Composition Overall Body Fat Change (kg) | Baseline and up to 3 weeks post intervention | Participants will undergo body composition assessment via DEXA (General Electric Lunar iDXA), which is commonly used in research due to its precision and safety. |
| DEXA - Body Composition Overall Lean Mass Change (kg) | Baseline and up to 3 weeks post intervention | Participants will undergo body composition assessment via DEXA (General Electric Lunar iDXA), which is commonly used in research due to its precision and safety. |
| Metabolic blood chemistries (fasting glucose and insulin) - Insulin Resistance Change (mg/dL) | Baseline and up to 3 weeks post intervention | Participants will fast 8-10 hours prior to blood draw. Blood draws will be completed to determine both fasting glucose and fasting insulin. These results will then be used to figure the HOMA-IR score, which is an insulin resistance score in mg/dL . |
| Brachial artery reactivity test (BART) - Endothelial function change (%) | Baseline and up to 3 weeks post intervention | Participants will undergo a BART via ultrasound. The test will measure flow-mediated dilation and endothelium independent dilation of the brachial artery using a high-resolution transducer on the Vivid E95, E9, Vivid IQ (portable) or Vivid I (portable) systems. Brachial artery flow-mediated vasodilation correlates with measures of coronary artery endothelial function and can predict future adverse coronary events. |
Countries
United States
Contacts
CONTACTKimberly A Walker, OTD
CONTACTKerri A Morgan, PhD
PRINCIPAL_INVESTIGATORKerri A Morgan, PhD
Washington University School of Medicine
Outcome results
None listed