The aim of this study is to investigate if Whole Body Vibration (WBV) is an effective training method to increase bone density and muscle strength. If WBV is effective we also want to find out what training recommendations could be given to reach as good results as possible. This study is a systematic literature study and we use Forsberg and Wengström´s method with final guidelines for how a successful literature study is done. In the background WBV is described and also bone density and muscle strength and deterioration of them. The literature search was started 21.2.2011 and finished 31.3.2011. Databases were searched, 26 articles were chosen and these were quality reviewed with ready-made checklists of Forsberg and Wengström. We made four issues and the results of these were summarized by analyzing the included articles and by replying to these four issues. The result of this literature study shows that WBV has positive effects on bone density end muscle strength in different target groups. Muscle strength is affected by WBV-training but in the same way as regular resistance training. The difference between these two training methods is that WBV increases the explosive muscle strength more. Training with WBV affects best the distal muscles of lower extremities and bone density in lumbal vertebrae, hip, femur and tibia. Training recommendations to increase bone density and muscle strength are quite different. To increase bone density the best training method is a frequency lower than 25Hz and higher than 45Hz, high amplitude, constant training for 10 minutes per session where you stand still on a vibration platform without pauses 5-7 days a week. To increase muscle strength an effective training would include a frequency between 25 and 45Hz, amplitude between 2 and 5mm, dynamic and static exercises in sets on a vibration platform with duration of 30-40min per session three times a week. The great differences in the interventions of the articles have complicated the interpretation and that is why the results can only be seen as guidelines.