My back hurts just looking at the 4 images at the top of the article. Also the positions in the upper-left, upper-right, and image further down the page cause l

My back hurts just looking at the 4 images at the top of the article. Also the positions in the upper-left, upper-right, and image further down the page cause lots of elbow strain. I had several months of numbness in my hands from spending too much time resting on my elbows like these photos.