PreDiabetes
Conditions
Keywords
PreDiabetes, Lifestyle intervention, Exercise Behavior, Adherence
Brief summary
The purpose of this study is to address whether inactive individuals with prediabetes who take part in the Small Steps for Big Changes program, which is a 3-week supervised exercise and lifestyle change program with brief counseling, will be more adherent to regular exercise one year after program completion compared to before they took part in the program.
Detailed description
The study is a one-group repeated measures design and the primary outcome is exercise adherence at 12 months post the 3-week supervised exercise program. There is no randomization of individuals to conditions. Exercise adherence will be measured using self-report physical activity (using the Godin leisure time exercise questionnaire) and a subsample will also wear tri-axial accelerometers to measure total time spent in moderate-to-vigorous physical activity assessed over 7 days. Secondary outcomes include physical fitness, haemoglobin A1C, quality of life, self-regulatory efficacy, anthropometrics, diet and exercise-related cognitive errors. The 3-week lifestyle program includes six sessions with a lifestyle coach and exercise sessions performed at home. These sessions will focus on regular healthy lifestyle that includes walking (or exercise of any kind) at least three times per week and will highlight simple dietary strategies that are linked to reduced risk of T2D. The 3-week supervised exercise program includes brief exercise counseling sessions that teach participants self-regulatory skills to promote independence and long-term adherence to exercise and a healthy diet. At the conclusion of the three-week program, participants will be asked to continue exercising a minimum of three times per week for twelve months on their own.
Interventions
BEHAVIORALLifestyle change
The 3-week lifestyle change program will introduce participants to a regular healthy lifestyle including exercise and dietary changes for reducing sugar intake, reducing refined/processed carbohydrate intake, increasing vegetable consumption. The 3-week program will include six supervised exercise sessions and three exercise sessions performed independently (e.g., at home or outside of the lab). The supervised session will include brief behavioral counseling sessions that teach participants self-regulatory skills to promote independence and long-term adherence to exercising and dietary changes.
Sponsors
University of British Columbia
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No
Inclusion criteria
* ability to speak and read English * BMI between 25-40 kg/m2 (as measured by body mass and height self-reporting), * blood pressure of \<160/99 mm Hg assessed according to CHEP guidelines, * not diagnosed with type 2 diabetes * no prior history of cardiovascular disease * not on hormone replacement therapy * Cardiovascular medications (e.g., statins) will be allowed if the participant is on stable therapy (6 months on same dose).
Exclusion criteria
, if subjects: * take glucose-lowering medications that have changed within the past 6 months; * report any explicit contraindications to exercise (e.g., musculoskeletal injury, chest pain during exercise) * report having had a heart attack or stroke in the past; * report that they are pregnant or plan on becoming pregnant over the next 12 months; * have uncontrolled major depression; * have bone or joint problem (for example, back, knee, or hip) that could be made worse by a change in physical activity which a physician has not cleared them for to exercise; * report that a physician has not cleared their participant for exercise.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| minutes of moderate to vigorous physical activity | change from before participants begin the program to 52 weeks after they finish the program for 7 consecutive days | objective measure of physical activity will be measured using tri-axial accelerometers in a subsample of \ 100 participants |
| independent bouts of physical activity | change from when participants begin the program to 52 weeks after they finish the program | self-reported measure of bouts of physical activity as assessed by the Godin Leisure Time Exercise Questionnaire |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Aerobic fitness | before the program begins (week 0), after the program is completed (week 3), 24 weeks after completion of the program (week 27), and 52 weeks after completion of the program (week 55) | six-minute walk test |
| glucose control | change from when participants begin the program to 52 weeks after they finish the program (week 55) | haemoglobin A1C |
| Perceived health-related quality-of-life | before the program begins (week 0), 24 weeks after completion of the program (week 27), and 52 weeks after completion of the program (week 55) | SF-12 Health Survey (Ware, Kosinski, & Keller, 1995) |
| Self-regulatory efficacy for physical activity and diet | before the program begins (week 0), after the program is completed (week 3), 4-weeks after the completion of the program (week 7), 24 weeks after completion of the program (week 27), and 52 weeks after completion of the program (week 55) | questionnaire |
| minutes of moderate to vigorous physical activity | 24 weeks after program completion (week 27) for 7 consecutive days | objective measure of physical activity will be measured using tri-axial accelerometers in a subsample of \ 100 participants |
| independent bouts of physical activity | 4- (week 7) and 24-weeks (week 27) after completion of the program | self-reported measure of bouts of physical activity as assessed by the Godin Leisure Time Exercise Questionnaire |
Other
| Measure | Time frame | Description |
|---|---|---|
| reach | before the program begins (week 0) | reach of the program as assessed by RE-AIM |
| dietary adherence | before the program begins (week 0), 24 weeks after completion of the program (week 27), and 52 weeks after completion of the program (week 55) | brief food frequency questionnaire |
| weight | before the program begins (week 0), after the program is completed (week 3), 24 weeks after completion of the program (week 27), and 52 weeks after completion of the program (week 55) | body weight assessed by objective scale |
| blood pressure | before the program begins (week 0), after the program is completed (week 3), 24 weeks after completion of the program (week 27), and 52 weeks after completion of the program (week 55) | mean arterial blood pressure assessed manually |
| waist circumference | before the program begins (week 0), after the program is completed (week 3), 24 weeks after completion of the program (week 27), and 52 weeks after completion of the program (week 55) | circumference of the waist assessed manually |
Countries
Canada
Contacts
Primary ContactMary E Jung, Ph.D.
Backup ContactJonathan P Little
Outcome results
None listed