his style of training is important to give you the ability to jog, run, skip, hop and other rhythmical movements. The intensity of the exercise performed on this threshold, starts the process of building up lactate acid in your blood. Cross the threshold and then your body cannot clear the lactate as fast as it produces lactate.
This eventually causes the muscles affected to become less productive. It is important to work on this, if you want to get a maximum amount of calorie burning effort into your workout, without feeling local muscular fatigue. Working below and on this threshold, then you will adapt by producing more mitochondria (the lab table of the muscles where fat is converted in to useable energy) and bigger mitochondria, which will help you burn more fat.