Sitting in front of the computer 12 hours is too long! Get up and move! You can also straighten your legs and relax while sitting!

Legs, that's terrible ... Best answer.

I have an idea: go upstairs.

When going up the stairs, your legs should be straight, and the middle of your feet should be at the edge of the stair sill, left and right feet.

Take turns going upstairs. I was not used to it at first. Hold the railing with both hands to avoid falling. Be good.

Rest and go upstairs.

Good luck!