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Is marathon running bad for long-term health?

I recently came over an article talking about purported negative health effects of long-distance running such as marathons. What amount of long duration, zone 2 cardio is too much, do we know anything about where the benefit of such training drops off and starts going the other way?

Since the eyes are part of the brain…

The recent video you posted showed how the eyes develop as part of the brain. Does that mean we can detect discreet brain actions by analyzing autonomic eye movements?

Eye lens state when using VR glasses

Disclaimer: I might use the wrong terminology here, but I think you will get the point. if you look at objects from close by, your eye lens muscles are under stress. if you look at the horizon or things far away, your eye lens is relaxed. What is the state of the eyes when you are using VR glasses? Would this somehow be looking at objects far away? Or is it close by?

Cold exposure between boxing rounds in a fight

I’m about to start a 14 week fight camp, and there’s an opportunity to get selected for a charity boxing fight at the end of the camp. If I end up fighting, would it be beneficial to use some of the cold exposure protocols that you’ve spoken about (for cooling the hands, feet and head) on your podcasts in between rounds? What would the best technique be, given that I’d need to have time to remove my gloves and wraps if I was cooling my palms? If removing my gloves and wraps is impractical, what other options do I have? Thanks!

Workout time

What time do you workout? In the fitness protocol it's mentioned 6:30am, elsewhere you say around 11am, elsewhere "around lunch" - 12pm?