This looks like a good support ("an extra muscle"), but it's important to train your own muscles. Rowing is great for strengthening the core and for stretching

This looks like a good support ("an extra muscle"), but it's important to train your own muscles. Rowing is great for strengthening the core and for stretching the back. I "row with Xeno" http://www.row2go.us/ http://www.row2go.us/ "Belly button to the spine, chest up, shoulders down."