You should talk to some ultramarathon runners. A woman I know did a 100K and slept for seven minutes en route. She didn’t win I know and train with plenty of u

You should talk to some ultramarathon runners. A woman I know did a 100K and slept for seven minutes en route. She didn’t win I know and train with plenty of ultra-endurance athletes in our MilFit group, and they’ll tell you the same thing - not least because several are ex-SF ;-) I’ve done the Fan Dance (with weight) and the last thing I’d want to do is a similar event the next day and the next and the next, culminating in the Long Drag. I almost certainly physically could do one more - but I can’t face it. The mind breaks before the body. That’s what separates endurance dilettantes like me from those what have what it takes to just keep going, which is what they are filtering for. Fitness per se is necessary but not sufficient. https://en.wikipedia.org/wiki/Fan_Dance_(exercise) https://en.wikipedia.org/wiki/Fan_Dance_(exercise)