Light Cardio Merch

Description: Punny illustration of a light bulb exercising

Description: A collection of nine cheerful light bulb characters engaged in various physical activities including jumping rope, cycling, climbing stairs, and exercising on a bench. The text 'LIGHT CARDIO' is displayed prominently at the bottom in bold blue lettering.

Description: High-intensity interval training (HIIT), also called high-intensity intermittent exercise (HIIE) or sprint interval training (SIT), is a form of interval training, a cardiovascular exercise strategy alternating short periods of intense anaerobic exercise with less intense recovery periods, until too exhausted to continue.