Often times we get so caught up in our favorite style of training that we don't leave room for any other training modalities to enter into the picture.
Personally, I find it's a great idea to expand your weight loss and fitness horizons by trying out a few different exercise methods and allow each unique program to help you to become a more complete and healthy person. For example, if you were to take a yoga class it would help you to become more flexible, balanced, and focused on your breathing, which in turn would help you become better at completing your strength training exercises. Your strength training will also allow you to become stronger which would aid you in your running or other cardio workouts. You could even make a case for how practicing martial arts will sharpen your mind/muscle control which will then filter into any other area of your fitness program.
In the end it's your choice to find a particular activity that you enjoy doing to keep your body healthy and fit, but my suggestion is that you become as well rounded as you can to ensure that your entire body benefits!
