How to do it: If you're able to walk at an easy pace for 30 minutes, and with your doctor's approval, add power walking to your routine by increasing the intensity of your walk. Pick up the pace to a speed that is slightly faster but that you still find comfortable, and pump your arms back and forth as you walk. If you find it difficult, cut back on the intensity and stick to a flat course. Do this several times per week.
Tips: Perform a 10-minute warm-up and cool down at a slower pace and lower intensity. Always stay hydrated - bring along a water bottle and sip throughout your walk.