It's entirely too hard to ascertain whether doing 2.5x more of whatever it is you're doing right now is really going to get you where you want to go. Sometimes,

It's entirely too hard to ascertain whether doing 2.5x more of whatever it is you're doing right now is really going to get you where you want to go. Sometimes, probably most of the time, the goal is learning, you want to immerse yourself into the space of possibility and figure out what's important. For a SEAL, someone regularly called on to do the impossible, the 40% rule makes perfect sense. For most of us, doing 100 pull ups instead of 40 is mostly missing the point. Spending 2 hours in the gym instead of 30 minutes for me is actually counter-productive. It's not how many pull ups you do on a given day, it's how many times in a given year you do pull ups.