Holding weight against
vibration increase the effects of gravity.
Because of this physical reality (described
mathematically as gravity equals mass times
acceleration), when vibrating, your muscles
must hold up to three times your actual
weight, the exact amount depending on the
amplitude and frequency of the vibration. If
you have any doubt about this, consider the
arm and shoulder muscle development of men
who operate jackhammers.
Every muscle fiber
will automatically tense and relax at the
same rate that the machine is vibrating,
usually twenty to fifty times per second.
That adds up to one thousand to three
thousand little tiny “reps” per minute, much
more work for your muscles than holding a
position (isometric exercise) or typical
whole body vibration, one hundred percent of
your muscles will be working, while in
traditional exercises only some of your
muscles are engaged. For example, in a non
vibration squat, only about 40 percent of
your leg muscles are working, but if you are
vibrating, 100 percent of your leg muscles
will be firing.
-Becky Chambers, BS, MEd “Whole Body
Vibration The Future of Good Health”.