GPS Watch- Triathlon Speed Tools

http://www.heartratewatchcompany.com/gps-watch-s/3.htm
Buy yourself a GPS watch which has a heart rate monitor that precisely measure pace, distance and heart rate. It's a important device to own inside your toolbox in trying to comprehend your body, and its specific boundaries, better. I've got a classic adage - whatever becomes measured is always that which will get improved.