Use this rule the next time you feel like giving up. If you’ve ever done an endurance challenge, race - or even a really tough hike - you’ll find there’s parts where you want to give up. Most people that think “I could never do that” - are more limited by their mindset than their physical capability. Their mental game is what needs work - and part of that is knowing what to expect your brain is going to be saying at different parts throughout the ...