On the bed, on the dining table, on the sofa, on the floor, etc but put the waterproof mat. Whichever works for your back.
We place waterproof changing pad on the table. Table height is comfortable for me, less stress on the back.
i actually never got a changing board for my kids... just the complimentary basic mat from hospital
I also placed baby on bed and sat down to change him.
Bed or sofa with changing mat
I sit down on my bed.
bed or sofa