<unk>  is a generic term used when<unk> s (mechanical oscillations) of any frequency are transferred to the human<unk> . Humans are exposed to<unk>  through a contact surface that is in a mechanical<unk> g state. Humans are generally exposed to many different forms of<unk>  in their daily lives. This could be a driver's seat, a moving train platform, through a power tool, a training platform, or one of countless other devices. It is a potential form of occupational hazard, particularly after years of exposure. When high frequency<unk> s (above 50 Hz) enter through the hands, occupational safety concerns may arise. For example, working with a jackhammer has been known to develop<unk>  white finger. Exposures and limits have been estimated in the ISO 5349-1 for hand-transmitted<unk> .<unk>  training as a form of physical exercise can offer some fitness and health benefits, but it is not clear if it is as beneficial as regular physical exercise. A 2018 meta-analysis has shown that<unk>  can improve bone mineral density in the lumbar spine of postmenopausal women as well as the femoral neck density of postmenopausal women younger than 65.
Whole body vibration
Continuous passive motion
Postural restoration
Weight-bearing
Hypnic jerk
Pilot fatigue
Glossopharyngeal breathing
Concussion