What is heart rate training? In very simple words, there are 5 heart rate zones in your body and we will explain them later on in this article. When you use your heart rate zones to monitor the intensity of your workout, it is known as heart rate training.

Interval training is not a new concept, though it has become a much better understood one these days. In its most rudimentary form interval training was referred to as "fartlek," meaning “speed play.” Slow and easy exercise was alternated with short and fast bursts of intensive exercise. Fartlek was an unstructured form of training, but today’s interval training is very specific and highly sophisticated. In fact, it is possible to create special interval to suit the specific requirements of individual athletes.