Great book! I loved it :). Love your article too! I know this "you can go further / harder than your brain tells you" from ultrarunning but have learned to appreciate it in strength training too. I was prepping for the SFGI Kettlebell cert in 2021 (canceled b/c of Covid...) and during these 6 months I have made so much more progress and often challenged myself to take the heavier bell, do one more rep with it etc. Our bodies are truly fascinating.