These exercises with intervals of maximum intensity put the body to work with more than 80% of their physical capacity.
This formula came to the fitness world to stay: High intensity although less time equals a greater benefit.
So it has become popular and has become the most fashionable type of training in recent years.
Rhabdomyolysis, the dangerous side of high intensity exercise
Several studies on the effectiveness of high intensity interval exercises highlight the benefits they offer to the organism, and as well as warn of the risks that are run when doing them, if they are not done correctly a great lesson occurs.
It works for a short time followed by another that helps recovery.
Do you know what exactly happens in the organism when we subject it to these strong and fleeting movements?
That's what the BBC journalist Max Mosley sought to find out, specializing in medical issues of the human body.
Interval training? These are periods of great physical effort (between 80% and 90% of the individual's maximum heart rate) followed by a recovery period, a sequence that is repeated several times in a session.
An example could be 10 speed races in a distance of 20 meters, interrupted by a minute of rest.
The distance, speed and recovery time can vary based on the state of the person's shape.
In the case of a cyclist, he could pedal at the maximum rate for 20 or 30 seconds, slow down to recover for a minute and then accelerate again.
Mosley had a group of scientists to show what happens under our skin from the moment it is activated almost to the limit of its physical capacity.
"We demand to the maximum to our body the sugar stored in the muscles is released and is used to propel the body during exercise".
The advantage of high intensity intervals is that because the body is subjected to such a demanding job, the body continues to work after finishing the exercise to try to return to a normal state.
Physical trainers warn that not all people are suitable for high intensity training.
Mosley reiterated the caveat that high level intensity exercises are not suitable for anyone and that those who do not have a minimum physical level or present a medical precondition should refrain from performing them without first consulting a doctor.