While Mj do the swim training three times a week, I noticed that her muscle toned a bit especially in her arms. Well, obviously it is because through waving and pushing with their arms it really helps build muscles fast. One way to tone your muscle is to exercise and work out as well, aside from swimming that’s the healthiest way to build muscles in your body. If you need to do it in an instant, well, there are also some products which could benefit you for fitness but of course you may need to ask your doctor first if the one you would like to buy doesn’t give you any harm or you may search for a good review for a particular supplement. Look it is better to be safe than to say sorry in the end.