[kortex]

Probably all of them on average then, but especially big groups, core, and erector muscles. Most humans who have to hit the gym in order to stay fit spend too much time sedentary. They need back and core strength to prevent back issues later in life, glute, hamstring, quad and calf to keep legs strong and mitigate knees doing weird things.

Most of aforementioned humans also likely need to move heavy objects from time to time without throwing out their back.

I read once that deadlifts are the single best exercise you can do for desk bod. If I only have 10 minutes to work out, I do deadlifts. Next I try to get abs, obliques, back stabilizers, etc., then some squats and leg work. I do chin/pull/push ups between the core and leg stuff.