Good posture also helps you breathe better, which can help you feel more energized and concentrate better. Your diaphragm doesn’t work right when you sit hunched over, so your breath gets more shallow.
If you ever need to talk a lot for work or some other reason, good posture is essential so your voice sounds good and doesn’t get tired too easily.
And it helps strengthen your core, which is good for balance and other things.
Aww. Looks like her fur is standing on end. But she’s pretty brave, getting so close to the Ungeheuer (monster). Nice to see her exploring her new home.