The aim of the study is to investigate the effects of exercise and vitamin D supplementation on reducing falls and injuries in community-dwelling, independent-living women aged 70-79 years of age. The investigators will test the following hypothesis: 1. Exercise including strength, balance and mobility training will improve muscle functioning and body balance, and thus reduce falls by 30% compared with non-exercisers. 2. Vitamin D intake will improve muscle functioning and thus prevent falls by 30% compared with placebo. 3. Together vitamin D and exercise have a stronger influence on fall prevention than either used alone. 4. Training improves mobility functions and bone health. 5. Supervised training twice a week with daily home training will improve physical functioning thus resulting in reduced fear of falling. 6. Reduced fear of falling and improved physical functioning help older people to stay physically active, which further improve their quality of life.
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number of falls
Timeframe: 24 months