Very little, claims Shannon Clark, in her seminal post of a few years ago:
“Right from the get go, it’s best if you can wrap your mind around the idea that if you really want to change your body, weight training is going to be the way to do it, coupled with a good diet plan.
Diet and lifting trump hours on the cardio equipment any day of the week as far as fat loss is concerned. Sure, some cardio will help speed the process, but you really do need to be careful here because more does not equal better when it comes to this side of the fitness equation.”
Also, lift more not less:
“Point two to this is that females typically do develop muscle at about half the rate of men, thus, again, this even further proves that you should not be concerning yourself with the thought that you’ll spout gigantic muscles overnight if you so much as pick up something heavier than 10 pounds.”