This clearly isn’t fair. For one, the “really hard” modifier is completely made up (did Guzey ever imply that the way to train sleep deprivation resilience is to go “really hard” at not-sleeping rather than easing into it?), and for two, physical stress to ones toes is clearly a much more local thing than caloric or sleep deprivation so the hypothesis would be “kicking things in a controlled fashion strengthens the thing you’re impacting with”.
And I’m not sure if it’s true or not, but it’s definitely a thing that professional fighters do, and it does not at all strike me as “obviously false”.
This clearly isn’t fair. For one, the “really hard” modifier is completely made up (did Guzey ever imply that the way to train sleep deprivation resilience is to go “really hard” at not-sleeping rather than easing into it?), and for two, physical stress to ones toes is clearly a much more local thing than caloric or sleep deprivation so the hypothesis would be “kicking things in a controlled fashion strengthens the thing you’re impacting with”.
And I’m not sure if it’s true or not, but it’s definitely a thing that professional fighters do, and it does not at all strike me as “obviously false”.