When performing cardiovascular exercise, your heart rate should be maintained within your target heart rate zone (calculated below) for a minimum of 20 minutes and a maximum of 60 minutes for at least 3-5 days a week to achieved a maximum cardiovascular benefit.
Cardiovascular interval training is one of the best ways to keep your heart rate within your target heart rate zone for an extended period of time. It also allows you to burn the maximum amount of calories in the shortest amount of time.
Weight loss is achieved when the # of calories you expend is greater than the # of calories you consume. By creating a daily deficit of 500-1000 calories, you can lose 1-2 pounds per week. For example, if your body requires 3000 calories per day just to stay the same weight, then by eating 250 calories less per day and by burning 250 calories through exercise each day(for a total deficit of 500 calories/day), you can achieve a 1 pound weight loss in one week.
Believe it or not, that is not hard to do. Replace calorie filled drinks with water and you are halfway there! Eat fruit for you snacks instead of calorie filled processed snacks and you are even closer.
Here is how you determine your target heart rate zone:
Max Heart Rate = 220-Your Age:
Max Heart Rate = 220 - 34 = 186 bpm
Target Heart Rate (Lower) = Max Heart Rate x (70%):
Target Heart Rate(lower) = 186 x (.70) = 130bpm
Target Heart Rate (Upper) = Max Heart Rate x (85%):
Target Heart Rate (Upper) = 186 x (.85) = 158bpm
My Target Heart Rate Range = 130bpm-158bpm
So my heart rate should stay up in the 130-158 beats per minute range the entire time I am exercising. Make it easy on yourself and figure out your 15 second count so you take up less time checking your heart rate while exercising. Better yet, get a heart rate monitor!