Interval walking training (IWT) is characterized as walking at 70% of maximum capacity (heart rate) for three minutes, then at 40% capacity for the next three minutes, repeating the process five or more times. Among a group of 679 older adults, those who participated in an IWT program for five months not only experienced improved aerobic capacity in comparison to a control group that did not exercise, but they also had a 17% reduced risk for lifestyle-related disease. Mayo Clinic Proceedings, October 2019