to prevent Paula Radcliffe repeating her London Marathon victory or your aspirations are more modest. But picking the right model for you can be tricky; with so many on the market and a variety of functions available, it may be difficult to decide exactly
to prevent you setting off way too fast and fatiguing early.Mode of exerciseIts important that you use the mode of activity that youre training for. For example, your MHR from a cycle test is almost certain to be lower than your running MHR, unless youre also
in a week. They will quickly reveal whether youve done more hard work than normal, and if this is the case, you can at least respond by taking an easier week to help you recover and prevent over-training.One software package goes so far as to offer you
