SoulShiners, Let me ask you something… Have you ever surprised yourself during a workout, an uphill climb, or a long day on your feet? Maybe you thought, I can’t hold this pace. I need to stop. I’m too tired…. And then somehow - you didn’t. You kept going. Not because your muscles suddenly changed, but because your mind did. New research published in the European Journal of Applied Physiology found that just three weeks of mental training improved endurance performance by 10%