![]() Our bodies have three basic energy systems with three distinct purposes to provide fuel for activity. More recently “anaerobic” training has become increasingly popular with HIIT, high intensity interval training workouts. This type of training requires you to hold a steady level of intensity at low to moderate endurance pace. This form of training is based on staying within a manageable level of exercise intensity at approximately 60-85per cent of your maximum heart rate for periods of 15 minutes or longer. ![]() In the late ’70s, “aerobics” became a household word and people everywhere began understanding the idea of aerobic training for improved fitness and health. This advertisement has not loaded yet, but your article continues below. The cardiovascular system is similar in that it will adapt to the demands placed on it. Once you are skilled you are far more efficient and it requires less effort on your part. When you start something new you waste a lot of energy mastering the skill. Therefore, all activity, whether it is mild or intense, is easier to perform. In other words, you can work harder with less effort at a lower heart rate. When the cardiovascular system is functioning optimally the level of intensity of work goes up with less effort needed to perform the work. When the cardiovascular system is untrained, the amount of work the body can handle at any heart rate is less. In this way, it provides more blood flow, oxygen and nutrients to the working muscles. When you push your body to produce more energy than it is used to producing, the body will immediately accommodate for the increased effort by amplifying your heart rate. ![]() It also whisks away the waste products of metabolism. This steady flow carries with it oxygen, fuel, hormones, other compounds, and a host of essential cells. The heart beats about 2.5 billion times over the average lifetime, pushing millions of gallons of blood to every part of the body. Manage Print Subscription / Tax Receipt. ![]()
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