The chest cycle pause is a topic of debate amongst health experts. There are those who believe that the chest cycle pause does occur when your chest slots are full, while others believe that this is not the case.
The truth likely lies somewhere in between these two positions.
The consensus among scientists seems to be that the chest cycle pause does occur when your chest slots are full. This is because when you are performing a chest cycle, your lungs must work harder to expel the same amount of air as when you are breathing normally.
When your chest slots are full, this extra effort can cause your heart rate to spike, and this in turn can cause your body to enter into a state of cardio-respiratory exhaustion.
The chest cycle pause is most likely caused by increased levels of oxygen deprivation in the body. When your body is deprived of oxygen, it will try to conserve energy by shutting down some of its vital functions.
One of these functions is the production of energy in the muscles. When your muscles are inactive, they cannot work as hard to generate enough energy to keep you alive, which is why the chest cycle pause occurs when you reach your maximal capacity for cycling.
