Haaaalp I did the pic related for 3 small sets and my back hurts

Let's see... needless and useless lumbar rotation and flexion, likely due to poor thoracic/hamstring mobility.
Stop doing stupid "ab" exercises

>>42308594
Then what am I supposed to do with my body weight and no equipment to improve my upper body?

>>42308626
??? Upper body? I'm sure you mean abs. Planks and side blanks with proper control, that's it mane

>>42308626
Dig around in the archive for body weight general. There might even be one up still.

>>42308526
Why didn't you stretch first you fucking faggot?

>>42308526
Just do planks, but instead of standard form put your elbows under eye level instead of shoulder level and squeeze your glutes. I forget what it's called but it's literally GOAT.