Nothing's worse than going to bed an hour early, and waking up tired.
Starting a 3 week block at 72 CTL. Hoping to finish it at 85-90.
When I'm on form my RHR is 35-43; this year its been about 53-48. So I really want to work on my aerobic engine. I'm not sure if basing resting heart rate off fitness is junk science but it seems to align well in the past.