A far infrared sauna is a type of sauna that uses light to create heat 34far34 describes where the infrared waves fall on the light spectrum a traditional sauna uses heat to warm the air which in turns warms your body an infrared sauna heats your body directly without warming the air around you the appeal of saunas in general is that they cause reactions such as vigorous sweating and increased heart rate similar to those elicited by moderate exercise an infrared sauna produces the