Like any resistance training, the weight you use is totally dependent on the exercises you plan to do, and your own strength. None of us knows how strong you are...

There are different types of med balls for different exercises. The kind that bounces is great for training by yourself, because you can do all those slamming and catching exercises. If you have a training partner, the smaller lighter squishy ones are terrific for one-handed throw and catch, and those are the ones you use with a lot of Pilates-style extended arm exercises, too.

The Power Systems catalog is like porn to me...