The Baseball Observer Feb 2015 vol 1 - Page 36

Do This Instead: Controlled Developmental Crawl The focus of crawls should be to own your mechanics while relearning an elementary movement pattern. If you're worried about not getting your heart rate up while crawling the proper way, it's obvious you've never tried this exercise. Slow and controlled movements will smoke you just the same as your uncontrollable butt-up hand waddle, minus the post-crawl pain! Second Most Damaging: Running Stairs