Since last weekends great training, something has not been right. I feel OK, yesterday I did feel ill but apart from that it only seems to aappear when I am running. Tuesday & Wednesday I noticed it more - everything felt harder than it should. Today it felt easy enough (until I lifted effort) but pace felt very slow. I did my HR test today. Same route (shorter warm down) but hotter and windy which would have contributed to worse results. Last week paces were 7.25, 6.12, 6.03, 5.47. This week paces were 7.19, 7.05, 7.05, 6.51. Clearly something is not right! 7/mm feels very very comfortable and slow which is a great sign. Even if this drags out that is a very solid base to build from. It's lifting effort that's feeling tough. 160 bpm felt like tempo and I wouldn't have fancied much more than a mile of it today even at 6.51 pace! The title suggests massive HR drift today. By the time I got to the start of the following mile ...