The aim of this study is to evaluate the effect of aerobic fitness training on mental health (health-related quality of life),cognitive and physical capacity in older people discharge from hospital and to assess if further aerobic training at home enhances the effect.

Design: Randomized controlled trial conducted at Oslo University Hospital, department of Medicine in conjunction with Oslo University College. The subjects will be randomized into one intervention group (training group) or one control group.

Outcome measure:

Health-related quality of life Physical function Cognitive capacity Physical activity Body composition Physical activity level

Research has indicated that participation in a regular exercise program is an effective intervention to maintain and enhance cognitive and physical function in older individuals.Despite good evidence regarding the positive effects of exercise, a sedentary or inactive lifestyle is common among people over 65 years of old, especially among persons with chronic diseases. Research shows that good mental health and physical capacity is of vital importance for living independently in the community and we know that participation in physical activity offers good opportunities to extend years of active independent life. Nevertheless our knowledge is sparse regarding the evidence of effective programs for health promotion in groups of elderly, especially after discharge from hospital. Our knowledge is also sparse as to which intervention program is the most effective, group-based training or home- based training.

Inclusion Criteria:

• 70 years or older
• Be able to perform the Timed Up and Go test without use of assistive device

Exclusion Criteria:

• Chronic disease with expected lifespan < 1 year
• Exercise regularly more than twice a week
• Cognitive impairment MMS < 24
• Assessed by a doctor not to tolerate aerobic exercises
• Exercise limiting cardiovascular or musculoskeletal disease