I teach group exercise classes 6 x’s a week. First, always give yourself a rest day. 2nd, women should weight train 2-3 times a week especially if you are in your 30’s because if you are inactive you start losing 3-5% of your muscle each decade. 3rd, cardio 2-3x’s a week. Mix things up every 4-6 weeks. Cardio is great for burning calories and it strengthens your heart. Weight lifting burns less BUT not in the long run. Muscle burns more calories than fat, increasing your metabolism. Soooo, if you weight train and build/retain muscle you will be burning more calories in the long run Good luck!