Rest is the key to recovery

My wakeup HR was 55 today. That is not quite a 20% increase. As a result, I'm taking a rest day today. I've been sleeping well, so sleep isn't the problem. I think the increase is from my running extra fast last week and the week before. Last week when I sensed I was tired, I reduced my speed but kept my medium and long runs at my normal duration for those runs; I should have reduced the duration as well as the speed. Hopefully, I'll sleep well tonight, and I'll see what my HR is like in the morning.