This guy has a strong back. Most Crossfit athletes derive alot of their strength from their backs, and it shows. The major portion of this muscle is white muscle, which takes alot longer to grow. But if I can get up to this guy's development, I have a theory that my back problems will pretty much go away. Core strength rocks.
Gonna hafta add this to my list of toys I want for Xmas. Imagine me walking down my street with this or pushing it along!
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