Riding a stationary bicycle counts as cardiovascular exercise. Regular cardio exercise helps lower high blood pressure, regulates blood sugar and may prevent heart attacks, especially if you’ve already suffered from one. According to the Mayo Clinic, regularly riding a stationary bike helps your heart become more efficient at pumping blood. It also increases the amount of good cholesterol while lowering the amount of bad cholesterol in your system to result in less plaque build-up in your arteries. The simple act of riding a stationary bicycle 30 minutes a day, five times per week may even extend your life.