2020 Fitness Baseline
After reading through Training for the Uphill Athlete I picked up a heart rate monitor (a Fitbit Inspire HR) and have started using the treadmill three times a week for an hour at a time. I wanted to record my starting stats so that I could refer to them later in the year. In order to build endurance 80-85% of your exercise volume needs to be in heart rate zones 1 and 2. The book suggested using Phil Maffetone's 180 formula to determine the beats-per-minute that define the upper limit of your zone 2. The formula is simple: Zone 2 [...]