Muscular strength relates to toning, or increasing muscle tissue and definition.
Cardio relates to aerobic activity, endurance and calorie burning activities like walking, running, biking, aerobics exercise classes, etc. So you understand what cardio is, and you even follow the guidelines of incorporating cario into your schedule four or five times a week for 20 to 40 minutes. There are two things you can do to make sure you're doing all you can to have a beneficial cardio session. Exercise within your training zone 2. To exercise within your training zone, you must first determine your target heart rate.