The idea is to make you do high-intensity, high-frequency exercise with all your strength, and then take a break before the next round of high-intensity exercise.
This kind of exercise can keep your heart rate high and burn a lot of fat in a short time. Because the heart rate is related to the effect of burning fat, the calories burned when the exercise reaches 60%-70% of the maximum heart rate are not as much as those burned when the heart rate reaches 75%-85%. Figuratively speaking, the more exhausted you are during exercise, the faster you burn more fat.
Some experts believe that HIT can increase the body's demand for oxygen during exercise and promote the body's demand for oxygen during the recovery period after exercise. This extra post-exercise oxygen consumption (EPOC) is also the reason why the fat burning effect of HIT is more obvious than that of ordinary exercise.
Hit strength:
HIT can be broadly defined as a training method in which the exerciser can't fully recover by repeatedly practicing for several seconds to several minutes with the load intensity of ≥ anaerobic threshold or maximum lactate steady state, and arranging rest or low-intensity exercises between every two exercises.
The so-called "high intensity" is a general term for anaerobic threshold intensity ≥, for example, in running events, this span can be from < 90% vvo2max (vvo2max is the corresponding running speed when the maximum oxygen uptake occurs in the incremental test) > 180% vvo2max.