Underwater, a slender figure moved swiftly, swimming back and forth.
Crabs on the rocks waved their pincers to amplify their presence.
Two quarters of an hour later, the figure quickly surfaced to breathe before returning underwater.
"The activity time has extended to about two quarters of an hour."
Liang Qu estimated the time and felt exhilarated.
In his previous life, the record for static apnea underwater was twenty-four minutes, and even when completely motionless, with an extremely low heart rate—almost in a state of "turtle breathing"—it was already one in a million.
Yet, in a state of rapid movement and high oxygen consumption, he could easily last half an hour without surfacing for air, a feat utterly inhuman, one that not even a martial master could achieve.
