Doing rows as pictured there does not "protect your back". It's actually more likely to cause injury to your back, placing undue stress (due to static position at a v.dumb angle) on the lower back.
Although it's unlikely to OP'er of qn is going to review this, being 6 months ago, should they or anyone else wish to be informed, due them parallel to the floor and go Youtube "pendlay rows".
Although it's unlikely to OP'er of qn is going to review this, being 6 months ago, should they or anyone else wish to be informed, due them parallel to the floor and go Youtube "pendlay rows".