This explains the vibration impact that occurs in a vibration exercise. In every second, you experience your body weight surging to 600LB for 30 times, each time lasts 0.008 second. To summarize, if you weigh 200LB and you use a vertical movement vibration plate that vibrates at 30 Hz with the G-force of 3. That mean, in one vibration circle, the time period you experience 600LB is a tiny 1/120 second (0.008 second). The upward acceleration is only 1/4 circle. If the vibration frequency is 30Hz, each vibration cycle takes 1/30 second. In vibration motion, the upward acceleration motion only happens in the 4th phase of a vibration circle. In this situation, you feel your body weight is 600LB. At a moment, it pushes you up at an acceleration of 3G, your body will need to overcome 3x200LB=600LB downward acceleration force. Now you step on to a running vibration plate. Our body systems, organs and tissues are all used to the 1G acceleration environment in which we live on this earth. Your body overcomes the 200LB gravity, and you feel your weight is 200LB. At 1G, there is a 1x200LB acceleration force pulling you down.

When you stand on the ground, the earth gravity tends to pull you downward, but the ground stops the tendency. If she tells you she experienced an acceleration rate of 29.4 m/s 2, you will probably not have much idea about the magnitude. It makes more sense if an astronaut tells you that she experienced 3G at the launch of her rocket. The acceleration rate using the G as the unit is called G-force. It is easier to comprehend the acceleration magnitude using the gravity G, because on the earth we are subjected to the gravity all the time. For topics related to the impact of acceleration on human body, people usually use gravity G (9.8 m/s 2) as the unit to express the acceleration.

3g vibration testing