Jericho is doing his usual morning yoga routine, both to keep himself limber/balanced for the stage and for his own personal enjoyment.
He's smiling because he likes yoga.
He's sweating because yoga is HARD.
(And I know that this pose isn't 100% correct, but it looked more interesting with one leg curved up.)

How exactly his back, wrists, and ankles got that way is for you guys to guess. /wiggles eyebrows/

(c) Jericho and art are both mine.