I have been doing about 1,000 “extra” stairs every work day for several years, and not much else for regular exercise. I do these in sets of 250, 4 times per work day.
My resting heart rate comes in under 50, if this adds any credence to the study results.
So far It has been working great
Anyone starting/doing strenuous exorcise, get a Coronary Calcium Scan for about $75. If you're just beginning are starting back, take it easy and work up to where you want to be over a period of weeks.
Proper exercise, nutrition, and a few supplemental nutrients can make a huge difference in a person's health status.