Attending a gym, fitness center or health club is a popular pastime of many people who wish to exercise and get in shape. Classes are offered in activities such as cardio endurance, toning, Pilates, spinning, step aerobics, core training, and kick boxing. Participants also use rooms with cardio equipment to get their own cardio workout. As many high schools are moving away from traditional activities and sports, they are seeking to mimic the fitness center environment and offer a variety of similar classes for students to enjoy. Meanwhile, some schools are developing their own cardio rooms in which they may have only one type of equipment (e.g., stationary bikes), while others have a variety of equipment. This article discusses the factors to consider when designing a cardio room and selecting equipment. There are several types of cardio machines currently available on the market: treadmills, stair steppers, stepmills, elliptical trainers, Versa Climbers, tread climbers, stationary bikes, spin bikes, recumbent bikes, rowing machines, and others. To help physical educators make a good decision, this article contains descriptions of common types of machines and their pros and cons.