Physical Activity Before Obesity Surgery (PABOS)

There are limited knowledge about the impact of increased pre-operative physical training on postoperative physical activity levels as well as on recovery and complication rates after bariatric surgery. The primary aim of this study is to investigate whether an intervention including individual coaching to improve level of physical activity before and after gastric bypass surgery leads to a changed of level physical activity post-operatively at eight weeks, one and two years. Secondary aims of the study are to investigate whether increased physical activity has effects on complication rates, re-admissions and re-operations, post-operative weight-loss, gastrointestinal pain, recovery measured as hospital stay, sick-leave and QoL, resumption of normal physical activity. METHODS 300 patients will be recruited and randomized to an intervention group or control group. The patients in the intervention group will receive individual coaching by a physical therapist to: increase physical activity 30 minutes/day (At least 150 min/week) decrease time spent sitting/lying The patients in the control group will receive standard care. Before surgery, 6 weeks, and one year after surgery patient will fill in a questionnaire including level of physical activity, sick leave, quality of life and gastrointestinal pain. In addition blood test will be taken and complication rates recorded.

Parallel Assignment A single blind, randomized, controlled, intervention study. Evaluation of the addition of increased physical activity for patients undergoing obesity surgery compared to standard care.

Increased physical activity daily before surgery. Standard care during hospital stay and continued training after discharge.

Preoperatively Individual coaching by a physical therapist to: increase physical activity 30 minutes/day (At least 150 min/week) decrease time spent sitting/lying Telephone follow up one week after the intervention starts At the hospital -Frequent mobilization After discharge A telephone follow up one week postoperatively with coaching by a physical therapist to: increase physical activity 30 minutes/day (At least 150 min/week) until 8 weeks postoperatively decrease time spent sitting/lying The intervention includes a prescribed FaR (Fysisk aktivitet på recept) with frequency, duration and intensity of the activity corresponding 12-15 on the BORG-RPE scale.

Anastomotic leakages, bleedings that require intervention, thrombosis, re-admissions and re-operations derived from the patient medical records

Sick-leave is prescribed one week at a time, patients are required to call the doctor, to ask for prolonged sick-leave a week at a time.

EQ5D, 5 questions with 3 different answers each (1 best value) leaving a 5 digit code which is transfered to a score from 0.3403-0.9694

Gastrointestinal Symptom Rating Scale, 16 questions rated on scales with 7 levels (a-low symptoms to g- worst symtoms)

Inclusion Criterion: - Patients at including hospitals scheduled for gastric bypass surgery Exclusion Criteria: Inability to understand given information. Inability to perform the intervention