He didn't need to eat; he didn't need to sleep; he didn't need to rest; he didn't even need to catch his breath.
Conventional stamina was infinite for Rui in his current stage. His cells could absorb radiation, could convert matter into energy, could absorb matter with breath alone. He reset his neurons to mimic the effects of good sleep. He could keep his mind in top-tier form at all times.
His motions grew smoother and smoother with time as he built a foundation of muscle memory, accelerating the process with certain neurochemical tricks to build muscle memory better.
WHOOSH WHOOSH WHOOSH…
His fists whipped through the air faster and faster each time. His brief flashes of 'lesser' existence grew deeper and more noticeable as he made use of the dimensions of motion in the higher dimensions more than before.
The biggest change, however, was to his psychology.
