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…
2 hours doing what in the gym? The balance of activities is the critical part, IME.