Although the force is to cooperate with breathing, the muscle itself is anaerobic and does not need the participation of oxygen (in fact, it is too late to participate). The oxygen you inhaled for the first time has almost completed a small part before reaching the cells of the corresponding muscle. Even inhaling pure oxygen can't provide much help on the spot.
I really want to say that the advice is nothing more than eating well and sleeping well. Add several groups of endurance training to improve blood supply ability in future training, and find a chance to have a physical examination at most (but even if the physical examination is finished, unless there is the best way to recuperate, it will be delicious and sleep well in the end)
First, it is common sense to pay attention to ventilation, strength, inhalation and exhalation. Second, we should pay attention to the influence of the weather, which makes the physical consumption worse, so we should make some adjustments to the amount of exercise. Third, we should pay attention to the ventilation of the exercise environment. If it is dark in front of your eyes during exercise, it may be that your physical energy consumption is too high or heatstroke occurs, so you should pay attention to rest.
Because the brain is too tired and consumes too much energy, resulting in insufficient oxygen supply to the brain, dizziness will occur.
Guiding opinions:
When people squat, their lower limbs are in a state of flexion. At this time, the blood vessels in the lower limbs are compressed, blood is difficult to flow to the lower limbs, and ischemia occurs in the lower limbs.
When a person who has been squatting for a long time suddenly stands up, the blood vessels in the lower limbs will be unblocked. At this time, it is like suddenly opening the floodgate to release water, and a large amount of blood will rush to the lower limbs. In this way, the blood supply to the head will be insufficient, and the brain will not get enough oxygen and nutrition for a while. Most people will have dizziness and heartbeat, but this phenomenon will soon disappear after the body adapts.
The conclusion is that this phenomenon is mostly normal.