On Earth, the breath holding record underwater was about thirteen minutes. Of course, those people had undergone professional training, and if Yi Yun trained himself more, his timing would be longer.
As the pressure increased, Yi Yun felt his lungs being compressed. His abdominal cavity was filled with bodily fluids.
The ribs enclosing his lungs were under immense pressure. It was as if a huge bear was stepping on his chest. Yi Yun even heard the creaking sound of his ribs.
If not for the bone training he had just completed, Yi Yun’s ribs would most definitely have broken.
With his abdominal cavity compressed, tremendous pressure was transferred to Yi Yun’s body, compressing his bodily fluids and organs.
Slowly, Yi Yun felt his limit approaching.