.If you don’t have a heart-rate monitor and want to check your heart rate on the run, take your pulse at the end of an interval, for 10 seconds, and multiply by six.Cross-training If you’re looking to substitute some cycling or other aerobic exercise
(upandrunning.co.uk).Forget about gadgets Heart-rate monitors, GPS watches, accelerometers that tell you how fast you're going - none of these glitzy products are really necessary for your first efforts. All you really need is a watch with a stopwatch function
