I like to remind people, especially the ladies who want to tighten their physiques, that eschewing weights is ignoring a really effective tool in that quest. Doing lots of cardio without lifting definitely has some health benefits and it’s important for overall fitness but it doesn’t actually sculpt your body. If you do enough cardio, it makes you look like a smaller version of what you looked like when you started. Weight training adds the pretty curves and lines that make the critical difference in the overall look of your physique. Working to be slimmer is a good goal and can be accomplished with a concentration on cardio but lifting to add that beautiful muscle in the right places does wonders for your overall look.
(photos from Google)