With Far Infrared you are able to boost the blood supply throughout the body without the difficulties or stresses that come with conventional physical exercise.
In other words, this is a passive exercise and when repeated regularly the heart can be rehabilitated. This is very helpful for heart patients and is in fact being used for those who have had heart attacks.
Normally during exercise the body uses up oxygen and can be left depleted, with what is called an Oxygen Debt. This process is actually stressful for the body and with Far Infrared (FIR) Thermal Therapy you are able to circulate blood without generating this Oxygen Debt.
In fact as you warm the body you also begin to breathe more quickly which helps raise Oxygen levels in the body even more.