Adding 30 minutes of mental training to 10 hours of physical training per week results in greater outcomes than physical training alone.

“if you do 10 hours per week of real world physical training again could be running could be music could be math could be whatever it is you're trying to learn shooting basketballs hitting golf balls and you add one hour or even half an hour of mental training to that real world training well then the results are significantly greater than you would experience with physical training alone”