When Runner's World readers were asked to list their essential kit last year, heart-rate monitors came out on top. Unfortunately for the female runner, using a heart-rate monitor is usually an uncomfortable experience, requiring 10 minutes before

information to be useful for runners who simply fancy giving heart-rate monitoring a go. It has a simple stopwatch – start, stop and no lap function – but you can keep a check on your current heart rate, your maximum and your average

to report back on the pros and cons of each.The result? These frank and honest assessments of some of the most recent models to emerge from the major brands. Cardiosport GT5 £149 Tested by Andy FowlerFeatures Heart rate shown as a % of maximum heart rate

Gone are the days when runners would rate our efforts based on the colour of their cheeks after a run. Heart-rate monitors are now so easy to use, affordable and accurate that there's no excuse for skipping the science bit in your training. Most