The fact is: our bodies do not move in a perfect vertical line when we pump. We actually move in an arc. It's not ridiculous to think that modifying the angle of the base might make pumping less awkward.
You guys have any idea how bonkers people go over a sliding spreader bar or a new safety leash?
This is simple question with an even simpler solution. Why are people so quick to flame?
Peter Frank described it perfectly.
I agree it's a bit awkward and probably depends a bit on your body somewhat.
To remove most of the "arc" when pumping adjust your stance...
Adopt a similar stance as if you're doing a dead lift.
Hinge at the waist, back straight or even better arched inwards ever so slightly
(stick yer ass out there and keep your shoulders out there lol)
Basically you want to do a "mini" deadlift motion ensuring your knees don't extend past your toes anytime during the motion. Arms are hangin straight down and pushing straight down on the pump. You might have to toe in your feet a bit at first to get your hands past your knees in the beginning but with practice you shouldn't have to.
Make the glutes and quads do all the work while maintaining back posture.
You'll see with a bit of practice (it's easy) you'll eliminate most of the "arc" to the stroke and almost go straight up and down.
It's easy on the back and engages only the big muscles of the legs if you do it right.
Take the pump out and try it in the living room.... good work out...haha!
Hinge at the waist and bend the knees as you pump keeping that back straight or arched inwards if you possible.