The Impact of a Pre-Operative Exercise Program on Fitness Outcomes Following Bariatric Surgery

University of Manitoba

Status: Completed

Conditions: Obesity

Treatments: Other: 12 week Exercise Program

Study type: Interventional

Funder types: Other

Identifiers

NCT02010489

H2013:388

Details and patient eligibility

About

BACKGROUND: Obesity is a global epidemic and Canada has one of the highest obesity rates in westernized countries. Obesity has many health related complications, including high blood pressure, high cholesterol, diabetes, sleep apnea and osteoarthritis. Bariatric surgery is the most effective way of achieving long-term weight loss and treating the complications of obesity. There is good evidence to support the relationship between physical activity and weight loss following bariatric surgery. While the period leading up to surgery is considered an important opportunity for lifestyle modification, evidence to support recommendations for a supervised preoperative exercise intervention is lacking.

OBJECTIVES: The objective of this study is to measure the short and intermediate-term benefits of a preoperative exercise intervention on patients awaiting publicly funded bariatric surgery in Manitoba. The primary outcome will be improvement in general exercise capacity as measured by change in 6-minute walk test (how far a person can walk on a flat surface in 6 minutes). Other outcomes will include excess weight loss, change in body composition, strength testing and irisin bloodwork & muscle biopsy.

HYPOTHESIS: It is hypothesized that preoperative exercise will result in improved exercise capacity and general fitness in the short and intermediate-term post-bariatric surgery.

METHODS: Patients who are awaiting publicly funded bariatric surgery in Manitoba will be offered the opportunity to participate in a randomized study between usual preoperative care (n=35) and usual care plus a supervised exercise program (n=35). Usual care will involve multidisciplinary evaluation and preoperative counseling with a kinesiologist. In the intervention group, patients will participate in a 12-week supervised exercise program at the Reh-fit Centre.

RESULTS: The study will determine the short and intermediate-term benefits of a preoperative exercise intervention on general fitness and exercise capacity as well as weight loss post-bariatric surgery. It is an important opportunity for collaboration between a multidisciplinary health care team and a medically-certified community fitness centre. Currently there are approximately 200 patients undergoing public bariatric surgery annually in Manitoba. If this study demonstrates a benefit to preoperative exercise, the results will be used to support an application to Manitoba Health for routine implementation of a similar intervention for all patients awaiting publicly funded bariatric surgery. It will also be used to support an application for a larger multi-institutional study of preoperative exercise at several Canadian bariatric centres.

Enrollment: 70 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Adult patients, 18 years or older
• Awaiting publicly funded bariatric surgery through the Centre for Metabolic and Bariatric Surgery
• Must be undergoing surgery within six months of tentative approval (usual timeline)
• Must be able to participate in an exercise program at the Reh-Fit Centre in Winnipeg. There will be a home option for some of the activities but patients will be expected to attend at least one of three sessions at the Reh-Fit Centre weekly

Exclusion criteria

• Orthopedic, neurologic or cardiopulmonary conditions that preclude moderately strenuous exercise
• In general, patients are not considered candidates for bariatric surgery if they are wheelchair bound or cannot tolerate moderate physical activity.
• Patients will also be excluded if they are unable to commit to attending regular sessions.

Trial design

Primary purpose: Other

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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70 participants in 2 patient groups

Control

No Intervention group

Description:

Following randomization, the control group will receive usual preoperative care consisting of two to four multidisciplinary visits over six months. During this time, patients will be provided with exercise counseling through the team kinesiologist. They will complete a behavior modification program called Craving ChangeTM and must achieve usual goals of lifestyle and dietary modification, along with modest weight loss of approximately 5%, in order to be scheduled for surgery. Patients will also complete a liquid diet consisting of 900 calories per day for two weeks prior to their procedure in order to reduce intra-abdominal obesity and facilitate the procedure.

12 Week Exercise Program

Other group

Description:

The intervention group will undergo standard pre-operative care and will also be enrolled in a 12-week exercise program at the Reh-Fit Centre in Winnipeg. The Reh-Fit Centre is a non-profit organization with the mission to enhance the health and wellbeing of its members and the community by providing innovative health and fitness services. The intervention will be offered at no cost to the patient. It will involve regular supervised exercise sessions at the Reh-fit centre three times per week. Most patients will complete the intervention prior to commencing the liquid diet but will otherwise discontinue the program while on the diet two weeks prior to surgery.

Treatment:

Other: 12 week Exercise Program