whole-body vibration / oscillating “balance training” platforms (often sold as WBV or balance tables).
A vibration/“balance” therapy platform where a person stands on a padded top while the base moves/oscillates.
The wider black base with a foot platform and the control box with a large rotary intensity knob and a red push button strongly suggest a clinic-style whole-body vibration / oscillation unit (often sold as “balance training,” “whole body vibration,” or “WBV” platforms).