Ten Thousand Method

I sit at my desk A LOT, which is bad for my back.
This gentle exercise is nice for spinal erectors, glutes, hamstrings.
You can modify the movement to engage each of these muscles more or less, depending on the range of motion you find comfortable.

ok how do I beat 20 pull ups in a row..?
I know my technique isn't perfect, but my range of motion is good, and my cadence is good.
If you can get more than 20 pull ups in a row (and you don't have the compact gymnast type physique!), let me know how you did it!