your chair is your enemy

Yup. Even ergo chairs.

geek posture

The classic geek posture has a name, and a cure. Its called "Upper cross syndrome", and there are lots of articles and videos about it:

git-whatchanged

I always thought git log --stat wasnt quite right, and hid many changes.
Today I discovered git-whatchanged:

Show logs with difference each commit introduces

Bingo!