This may be trivia to many of you.
Textbook says the oxygen deficiency, even for a short while can injure our cells. Then why do people go for sports like swimming? (where rhythmic breathing is required yet, there's a practical possibility of holding the breath longer than usual inhale exhale process) I am looking for a reasoning from cellular biology/patho-physiology/respiration aspect. And not because swimming or any other such exercise is anyone's choice/preference.
So my question is: during sport like swimming, does the oxygen level in our blood drop below a critical level, that cells might suffer from lack of oxygen?
Also found some relevant information here.
Currently referring to this online text : Swimming Fastest: Physiological Responses to Exercise.