They recommend I get 30 minutes of continuous aerobic exercise 5 or 6 days a week. Walking works best for me. I may have to get a treadmill to get 30 minutes every day in the winter.
Today I got more than 30 minutes of walking. I walked to and around Arbor Lake, Arvada, Colorado. It is 0.7 miles to the lake and 1.2 miles around the lake. I walked 2.6 miles in 55 minutes; that's 2.8 miles/hour.
Arbor Lake sunset
August 16, 2013.