This episode I discuss endurance: our ability to perform effort over extended amounts of time. I describe the four kinds of endurance: muscular endurance, long duration (single-set) efforts, and the two kinds of high intensity interval training (HIIT). I discuss efficiency of effort and maximizing quality of effort, and a hydration formula. I review how our heart literally gets stronger when we oxygenate muscles properly. I also discuss motivation for long bouts of work and the visual physiological basis of the "extra gear" we all can leverage for effort. Finally, I review how accelerating as we fatigue can allow us to access untapped energetic resources.\nAccess the full show notes, including referenced articles, resources and more at hubermanlab.com.\nThank you to our sponsors:\nAG1 (Athletic Greens): https://athleticgreens.com/huberman\nLMNT: https://drinklmnt.com/huberman\nWaking Up: https://www.wakingup.com/huberman\nMomentous: https://www.livemomentous.com/huberman\nTitle Card Photo Credit: Mike Blabac\nDisclaimer