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For a program to be truly effective, it must include both cardiovascular and strength training activities. True, you burn more calories during cardiovascular activity sustained within your target heart rate zone for 20-mins or more, but weight training builds muscle, tones and strengthens your body, and keeps your metabolism at an optimal level. Muscle is also where fat is burned!
Cardio 411
The Benefits of Cardiovascular Training
The benefits of consistent training extend beyond the obvious changes that occur. Yes, your physique will shrink, the number on your scale will go down, and your wardrobe will become more flattering. In the short term, you will:
•   Develop a healthier heart
•   Increase endurance
•   Strengthen muscles, bones and joints
•   Sleep better
•   Improve sense of well-being
•   Cope with stress better
•   Burn calories more efficiently
Those are some great benefits for a modest time commitment on your part. But wait, there is more…over the long-term, regular physical activity will also reduce your risk of:
•   Dying prematurely
•   Dying from heart disease
•   Developing diabetes
•   Developing high blood pressure
•   Becoming obese
Some studies correlate regular exercise with a lower incidence of colon, breast, lung and multiple myeloma cancers.