HOUSTON -- At practice, Houston Texans cornerback Kevin Johnson sometimes trots over to a tent, pitched between fields, that protects the team's sports science computers from the unrelenting sun of a Houston summer.
He's still recovering from surgeries on his foot and wrist this offseason, and the data accumulating on those machines -- thousands of numbers every day -- is helping his comeback bid. Every day in practice, he and other players wear technology that tracks their bodies. After practice, he and his fellow defensive backs compare their numbers.
"I'm always interested in my top speed and the explosive movements that you do, just to gauge how hard I'm working," Johnson said.