After I started martial arts I did noticed that my reflexes got faster. But you should keep in mind that you also need accuracy. You can be the fastest person on earth if you can’t hit your target, you failed. One thing that I recommend, it is something we use in our school. Try using this new targeted sparring gear. It is great for developing aim and speed. You can find is almost everywhere now. Check out there web site at zaigear.com I am telling you it is amazing how much sharper you become.