Changes

=== Treadmills ===

=== Treadmills ===

Stephen Wolfram<ref>https://writings.stephenwolfram.com/2019/02/seeking-the-productive-life-some-details-of-my-personal-infrastructure/</ref> and [[Seth Roberts]]<ref>https://sethroberts.net/2011/04/18/my-treadmill-desk/</ref> both recommend treadmill work desks. Gwern conducted a treadmill desk experiment and found that it lessened his typing speed a bit and recall a noticeable amount[https://www.gwern.net/Treadmill] Walking and running is most natural human exercise. It is used in most sports. Treadmills set the the pace and exertion unlike every other form of exercise. As a consequence analyzing fitness with them is much easier. Also it relies less on willpower to keep going fast.

Stephen Wolfram<ref>https://writings.stephenwolfram.com/2019/02/seeking-the-productive-life-some-details-of-my-personal-infrastructure/</ref> and [[Seth Roberts]]<ref>https://sethroberts.net/2011/04/18/my-treadmill-desk/</ref> both recommend treadmill work desks. Gwern conducted a treadmill desk experiment and found that it lessened his typing speed a bit and recall a noticeable amount.<ref>https://www.gwern.net/Treadmill</ref> Walking and running is most natural human exercise. It is used in most sports. Treadmills set the the pace and exertion unlike every other form of exercise. As a consequence analyzing fitness with them is much easier. Also it relies less on willpower to keep going fast.

=== Physical energy ===

=== Physical energy ===