- Oct 15, 2015
I'd say at this moment in time, not to necessarily worry about it. As the seasons transition, it's going to be difficult to use pace or HR cues to determine fitness gains. So it's best to continue to follow the plan and trust that it is working. Even if "easy" goes from a 16:15 min/mile to a 16:45 min/mile is not an indictment. There are plenty of good reasons why you should see your pace slow if the temp increases or the training load increases.
The best way to know is that what was once hard doesn't feel as hard. So say s 2 x 3 interval at 105/30 was hard. But then you find a 3 x 4 interval equally hard later in the plan. My guess is that if you went back and did a 2 x 3 interval instead of the 3 x 4 interval you wouldn't find it as hard as when you originally did it. That would show gains and progress without using pace or HR as a cue. I personally look for the verbage used to describe the runs as a means to determine how someone is progressing.