Any type of regular cardio exercise can help you lose weight because you burn more calories. So, if you stick to eating healthy foods, stay away from junk foods, and strictly limit refined processed...
Your body is in constant motion. If you run correctly, most of your muscles should be working. The more you run the better. You're working the whole body and not working on one section. It's great...
Running in water presents your body with more resistance than running on dry land (in air) and so makes it a great exercise which is also a lot gentler on the joints than running .