I used to think running, biking and other steady state exercises were good for your heart. It turns out, they are not. Marathon runners have slightly fewer heart attacks than people who do not exercise at all.

The type of exercise that had the fewest heart attacks was high intensity interval training. You need to exercise hard for 60-90 seconds to get your heart rate up high, and then give your body about 2 minutes to recover.

This can be done at any age! You can use an elliptical, run, bike, etc.… Anything that gets your heart rate up! Do these 2 to 3 times per week.

This trains your body to be able to adapt to the stresses of life. Then, if you want to do some steady state exercise on your other days, go for it!