There is no doubting of the tremendous long term value that training and a little know how has on powers of concentration & memory. No credible academic study will dispute this fact ,When you know what you are doing .When you have the right tools . MEMORY & FOCUS can be trained . The best part, you will see dramatic improvements in just a few days. Improvements that will last a lifetime . The caveat . Just like any exercise you need to push yourself. You need to overload at speed over time .