If you're paying attention to the advice out there about being healthy it's hard to miss the suggestion of cardiovascular exercises. Experts recommend to engage in aerobic (also known as cardiovascular) exercise at least three times a week for a minimum of 30 minutes each time. There are many options for performing this exercise and while gyms are popular many opt for buying an aerobic training machine and using it at home. The most popular types of stationary bikes. All offer different cardio benefits for users.