There was a time when the optimal exercise speed was however fast you had to run to get away from a saber-tooth tiger. Even today, in much of the developing world, people exercise through activities such as farming and fetching water that are necessary for survival. However, in the developed Western world, where exercise tends…
This Post Is for Paid Readers Only
We hope you enjoyed this free preview. To continue reading, get full access to the ParentData archive, and receive the regular ParentData newsletter in your inbox via Substack, consider becoming a paid subscriber or upgrading your free subscription in Substack.
Once you subscribe, you will be sent an email with sign-in instructions. Be sure to check your spam folder.
Already have an account, Sign in