Sigma Sport

Sigma's PC 15.11 is like having a personal trainer attached to your wrist. It's perfect if you want all the functions of a heart rate monitor with added features like a lap counter, calorie counter and interval trainer. It also lets you know the percentage of training time spent above a programmable upper limit, your current heart rate as a percentage of your max, and total calories burned in a session. The easy-to-read zone bar, zone indicator and display of training time in the selected zone all enable you to dial in your workout, getting you fitter and faster.