Don't you just hate it when you are jogging, but then you over-do it and fall down from exhaustion and the ambulance arrives and the paramedics say you have just had a mild heart attack and you have to go to the hospital and you miss that evening's episode of ER?

Now you can bid adieu to those cardiac collapse blues, with the new Polar Heart Monitor. Simply strap the plastic transmitter belt around your rippling torso, and turn on the wrist receiver. Preprogrammed with your age, weight and sex, the device will track your heart rate as you exercise. If you go over a certain limit - for example if you were about to have a cardiac arrest - an alarm goes off.

"Practically every rider in the Tour de France is using Polar," says one Irish stockist, "so too is our own Catherina McKiernan". The Polar Smart Edge Heart Monitor, £127, is available from McHugh Himself in Lusk, Co Dublin, tel: (01) 843-8409, and other good active sports shops.