humans holding breath for longer

No.12034780 ViewReplyOriginalReport
https://www.youtube.com/watch?v=h4ctfQpx3qk
spoilers i guess. at the end of bladerunner 2049 a genetically engineer person is chocked and placed underwater. they seem lose breath as quick as a normal human and die. if you were designing a human to hold their breath for a long time what changes could you make? could you design the lungs of the human to be similar to dolphins/whales or do whatever dolphins/whales have to able hold their breath for a long time?