The main aim of this Cohort trial is to get more information about how life style changes affect work participation for people with BMI above 30. The information can contribute to improving the quality of occupational rehabilitation programs in the specialized health care services and for others who work with weight loss programs and work related rehabilitation programs.

The goal of rehabilitation, in general, is to help people to reach and maintain their optimal function and copying capabilities and to promote independence and participation in society. For occupational rehabilitation is the goal also to increase function and work ability to prevent the individuals permanent to fall out of working life. People with high BMI needs beside work rehabilitation also focus on life style changes to reduce consequences of obesity. The Central Norway Regional Health Authority (HMN RHF) has initiated action to reduce work absence and consequence of obesity by introducing a work related rehabilitation program for people with BMI above 30. This program combines work participation and life style changes and exists only in two institutions in Norway. The goal of the program is to increase function and work ability and weight loss. The program is new, and few documents exist on the effect and the correlation between life style changes and work ability. There is also need to question whether obesity is the reason for work absence or is there other factors that affect work ability. This trial wants to follow-up a group of people who have been participating occupational rehabilitation at Muritunet.

Inclusion Criteria:

1. People who are on sick leave or stands in danger of being sick because of problems related to obesity.
2. The participants must have a realistic opportunity to return to work.
3. Body mass index above 30
4. Age 18-67 years.

Exclusion criteria;

1. People with a severe eating disorder.
2. People without a capacity to consent.
3. People with severe alcohol and/or drug abuse.
4. People with a major mental illness.
5. Being pregnant.
6. People with a health condition that contraindicates physical activity.
7. People who receive work assessment allowance.
8. People with or plan to apply for disability benefits.
9. People with permanently adapted work.

Due to the nature of the study intervention, it is not possible to blind the participants. Some of the participants will give a focus group interview and their identity will be known for the other participants in the group. The health care providers will not get information about who will participate or not.