Chapter – 2 Harnessing Adaptability According to Ericsson, if you are body builder it’s easier to track the changes in your biceps, triceps. quadriceps, pecs, delts, lats, traps, abs, glutes, calves and hamstrings. If you are running, biking or swimming to enhance endurance, you could track your progress by your heart-rate, your breathing, and things like that. But how could you measure your mental advancement? Let’s say, you have become an expert in algebra or some music instrument? Difficult, right? Because you can’t develop six-pack on your forehead. And, in case you think, there isn’t much going on in your brain, you are not alone. But then, make no mistake. There’s a growing evidence of that suggest that brain muscles expand in response to various sorts of training just like your muscles and cardiovascular systems in response to physical training. The Brains of London Taxi Drivers It’s not easy to become a London taxi driver. (And by the way,