How many times did you go for a run, after a period of inactivity, and for the first few minutes you had the feeling of not being able to move forward, until you hear “wind breaker”.
Technically you haven’t broken anything, you only have reached a steady state, where your oxygen consumption (VO2max) is equal to the consumption demand of your muscles.

Your body, to start the business, asked temporarily to anaerobic energy system, until within a few minutes the intervention of aerobic system has operated to produce ATP (energy currency).

This contribution is not free to dispose of the waste generated from energy production the system anaerobic (lactate and lactacid) has contracted an oxygen debt.

The higher the intensity of work, the higher the value of oxygen debt, especially in untrained subjects.

This explains the reason of breath (hyperventilation) after a strenuous exercise, the body will still require oxygen at a higher rate than the base values (those values when you are beautiful comfy on the couch) to pay debt and restore its equilibrium (homeostasis).

This phenomenon is called EPOC Excess Postexercise Oxygen Consumption which stands for, translated as “excess oxygen consumption at the end of the training session.”

How long??? The recovery depends on how you train and the ability of your body to restore the anaerobic system: should ri-phosphorylate creatine and transforming pyruvate into glucose.

According to some studies can help continue operations at a low intensity (slow jog, walk) instead of stopping abruptly and standing or seated.

In boxing you can leverage EPOC through workouts method HIIT (High Intensity Interval Training) studied on the alternation between high and low work intensity, heart rate variation can, through a continuous passage from moderate frequencies at high frequencies and vice versa during the execution of exercises to specific character (pads, etc.) or nonspecific (circuit training etc..).