# Pages 42-44 Paul LaFontaine (stress and HRV): <nowiki>https://quantifiedself.com/blog/paul-lafontaine-heart-rate-variability-flow/</nowiki> | # Pages 42-44 Paul LaFontaine (stress and HRV): <nowiki>https://quantifiedself.com/blog/paul-lafontaine-heart-rate-variability-flow/</nowiki> |