FM500 FM100 FM300B FM300 Studies have shown that 70% of all women and 40% of all men have health issues such as blood clots, varicose veins and pressure on the Achilles tendon due to pooling of fluids in the lower limbs — the result of prolonged, inactive sitting. The foot machine, with its ball-bearing, roller design encourages gentle rocking of the feet in the same way a rocking chair encourages movement. This rocking motion uses most of the lower leg muscles and increases healthful circulation. The foot machine also performs as a standard foot rest, providing support for the legs and relieving pressure on the lower back.