Seriously ladies… learn to love lifting. Your body doesn’t produce testosterone so you won’t bulk. Weights are what’s going to give you that tight, muscle tone that you don’t achieve from cardio. You don’t have to go crazy and start taking supplements. A balanced diet with enough protein in each meal will allow you to build muscle. If you don’t have a gym membership, you can buy a few different sized weights and do lifting at home. A rep should feel like work, but you should never strain. Use a weight that you’re comfortable with and when it starts to feel easy, up the weight by 5-10lbs.