Describe interval training in detail .Give …

nterval training is a method of training where you increase and decrease the intensity of your workout between aerobic and anaerobic training. Interval training in Sweden, where some say it originated, is known as fartlek training (Swedish for "speed play"). The protocol for interval training is to push your body past the aerobic threshold for a few moments and then return to your aerobic conditioning level with the objective of improving your performance (speed, strength, and endurance). The aerobic threshold is the intensity where your body switches from burning a greater percentage of fat to a greater percentage of carbohydrate and is generally 85% of your maximum heart rate (train below 85% and it's considered aerobic exercise; train above 85% and it is considered anaerobic exercise).