This is a dilemma many people new to fitness come across when reaching toward their goal. People tend to associate cardio with just running and weight training to lifting so much weight, you turn into a young Arnold Schwarzenegger. In reality cardio is an array of physical activities that strengthen the heart and lungs, while also burning calories and to help weight loss. Weight training helps increase your metabolism, tone your body and increase flexibility.
You don’t need to choose between the two. It's always best to have balance and incorporate both styles. They also possess attributes that help one another. Adding weight training to your routine will help increase your muscular endurance, which can help you run, bike and swim longer. While the addition of cardio to a routine can help you lift weights longer, which will result in a stronger and more tone body.