can anyone offer any advice?
done a couple of marathons and half's in the past, currently following a Hal Higdon half marathon programme which I've done before, feels fine, not too hard, previously I substituted one of the easy runs for intervals, not even doing that this time out
Just started using a Garmin HR monitor, mainly because there was one in the box with the new watch i bought rather than any desperate need to gather data. When I upload any long run or pace run to the Garmin site it consistenlty tells me I am 'overreaching' on the training effect.
Can anyone point me in the direction of some info on HR in training, suddenly started worrying about to keel over half way round the park.