Today's set was a sequence of 100m, 200m, 300m, 400m and 500m wrapped in a few technique lengths. I thought I was going along fine but the final figures show that I was going almost 20% slower than last week. This set is supposed to be relaxed and aiming for rhythm rather than speed but the underlying concept must be to find a nice efficient way of making progress.
My morning resting heart rate has been dropping since Sunday but it is still elevated so clearly still a background of fatigue. At least I've been and done it.