Polars high end RS300X sports computer starts by combining speed, distance and heart rate monitoring and adds an impressive set of options and data analysis to provide coprehensive performance and training information, so you can go into as much (or as little) detail as you want to.

The use of the G1 GPS sensor provides accurate speed and distance readings for use in any outdoor activity, and makes it possible to use that data with heart rate tracking to tune your training program in a variety of personalised ways.

This is a highly configurable computer that can be set up to help tune your training and monitor your ongoing fitness. Be warned - you might not want to leave the house without it!