I wouldn't waste your time with ankle/wrist weights. My guess is that you are after some form of muscular endurance in order to improve you MA training. The best thing is to start lifting or doing Body Weight exercises. Improving the muscles in one's arms and the distal parts of one's legs (ie. below the knee) should come only as an after effect on working specific multi-joint exercises. These multi-joints are the shoulder/rotator-cuff, hips, knees, and then the core. This covers the entire body, and will develop the proper muscular endurance necessary for martial arts (or any physical endeavor). Plus, you should be lifting as fast as possible with as much weight as you can.
Start doing some reading. Look up Strength and Conditioning Coaches like Alwyn Cosgrove, Robert dos Remedios, Mike Boyle, Chad Waterbury, etc. These guys know what you need for the proper athletic requirements in order to be the best.