Walking over 3 miles an hour is classed as moderate exercise. 2.5 hours every week, so most experts suggest 30 minutes a day, five days a week or if you prefer, 20 minutes every day. If you can manage 4.5 miles per hour or uphill, thats vigorous exercise similar to light running or cycling. At this intensity, an hour and fifteen minutes a week is sufficient.
Men age 17-25 should complete 5 miles in a 83 minute period and Men 25-35 should complete 5 miles in 87 minutes. Women in the 17-21 age range, should complete 5 miles in 85 minutes with Women 25-35 achieving 88 minutes.
Over 35s Men over 35 should complete 5 miles in a 90 minute period and Women over 35 should complete 5 miles in 92 minutes.
Over 60s Men over 60, should complete 5 miles in 93 minutes with Women over 60 managing it in 95.
Safety It goes without saying, consult your doctor before starting miles, especially as you get older, if you have health concerns or have not had a recent check up.
4 miles should take about 67 minutes on average.