San Francisco 49er (and Jamba Juice franchisee) Vernon Davis is the most prolific tight end in the NFL. What keeps him at the top of his game? In this special edition of our "One-Up" series, Vernon shares some of the exercises he's been doing during the off-season to "one-up" defenders this upcoming football season. This week, Vernon takes you through the Plyo Pushup. Set your timer for 30 seconds and see if you can beat Vernon's score!
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