The goal of this clinical trial is to learn about physical activity's effect on health in people who have had surgery of a non-functioning pituitary adenoma. The main questions it aims to answer are: * Do physical activity increase quality of life? * Do physical activity increase general health, cardiovascular fitness, self-efficacy and muscle strength and reduce fatigue and cardiovascular risk profile? Participants will at the start of the the study, at 6 months follow up and 12 months follow up: * Fill out health surveys * Perform a cycling test, hand strength test, chair stand test and wear and accelerometer for a week * Undergo a dual energy X-ray absorptiometry to measure muscle and fat mass * Leave blood samples Researchers will compare those who are randomized to the intervention and see a physiotherapist to get an individualized and person-centred prescription of physical activity plan and those who are randomized not to be in the intervention to see if physical activity increases quality of life and general health.¨.