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keto3000's avatar

Great article! I was raised in the 1980s ‘aerobic class’ era where ‘truly optimized’ aerobic activity was defined by the American Council on Exercise’s as involvement of all 5 major muscle groups simultaneously to produce best results.

Burpees, jumping jacks, rowing, bear crawls, etc.

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Maria Senkel's avatar

I am retired so I have the time. I use the Morpheus system (Peter Attia interviewed the creator) which has only 3 zones. Zone 1 and 2 (blue zone) are compressed but users know the high end of the blue zone is more zone 2. The zone range changes based on recovery and resting heart rate for the day so it is a dynamic zone 2. I get my zone 2 via the rower but also walking after meals on a hill near my house. Average time is 30 minutes or so on those activities. Morpheus is a great system to track zone 2 or other zones.

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