I believe to grow, you have to push yourself.
Experiment 6, run 20k a week (in progress). My gym is conveniently located 3.1 miles away from my home. For the summertime (while I am living at home) twice a week I have been running to the gym, working out, and running back home. This experiment is a mental challenge, not a physical challenge. The next experiment is running a 5k in under 20 minutes.
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