Resistance training is using you muscles to overcome the resistance you are experiencing. The resistance can be weights or just every day resistance like lifting children or climbing stairs or the weight of you own body in doing pull ups or squats.
Why should you do it? One of the main reasons is your metabolism. Resting metabolism means the calories you burn just resting. The higher your resting metabolism, the more calories you burn.
Muscles burn calories. Resistance training will give you more muscle. Resistance training maintains and builds muscle so you can work harder and burn more calories during activity. Your body will burn more fat. Your metabolism becomes supercharged following a resistance workout. The harder you work the greater and longer lasting this supercharge lasts. Cardiovascular workouts don’t have the after-burn of a resistance workout.
Muscle is very good for burning calories and fat. It’s also very good at making you look good. Not just because you aren’t fat but because muscle gives you shape and definition.
You should do resistance training at least 3 days a week. With circuit training it should only take 15 or 20 minutes. As you get more muscle you can add more weight to work even harder.
Resistance training will build your endurance, will build muscle, will make you lose fat and you will get stronger.