Stand on the force plate and steady yourself against a wall or table to show the reaction of your body to the blood flow from the heart deflected downward by the aortic arch.
The pattern is displayed on the big screen via the interface box.
(show force plate setup)
Typical pattern produced showing 5 heartbeats.
(set sample rate to 100/sec, set Y axis to +/- 5 N, zero after stepping on plate)