Tips » Cardio and Aerobics
My goal is fat loss, so should I just do cardio and skip weight training?
Doing just cardio can be a recipe for disaster, simply due to the stress it places on your joints. You need muscle to support those joints, and muscle will not come unless you strength train your legs. 9 out of 10 women are concerned about the size of their legs and feel they put on muscle too quickly, while only 1 out of 10 can actually qualify this - in other words, it is usually genetics that determines the shape/size of your muscle and the rest of the variation is fat. It is very difficult to easily put on muscle.
I would not forego leg training. If you are concerned with size or truly are the 1 out of 10 with the genetics to put on muscle that quickly, restrict your leg workout to bodyweight exercises - do free-form squats, static lunges without extra weight, work to doing them one leg at a time, etc. This will ensure you keep the muscles surrounding the joints strong, improve stability and coordination, without going to the length that would stimulate significant muscle growth - instead you'll gain more strength and coordination.