I think self-challenge is a great thing, but I never understood CEOs whose understanding of self challenge is basically confined to the physical realm - trainin

I think self-challenge is a great thing, but I never understood CEOs whose understanding of self challenge is basically confined to the physical realm - training like Navy Seals, motorcycling, climbing difficult mountains, doing an ultra marathon, etc... You can challenge yourself on a lot of levels, but it always feels a little brute when it's only physical stuff. Of course to truly broaden yourself, to grow in the deepest, meaningful ways, you won't have time to do it if you're a CEO.