This document discusses human vibration, including whole body vibration and segmental vibration of the hands. It defines key vibration terms and describes health issues from prolonged whole body vibration exposure like low back pain. Prolonged use of vibrating hand tools can cause hand-arm vibration syndrome, with symptoms like vibration white finger. The document outlines vibration exposure limits and strategies to reduce injuries, such as using anti-vibration gloves and redesigning tools to reduce transmitted vibration.