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Former tight end Kellen Winslow Jr. switches gears.
Hop in for a new take on breaking a sweat.
Bike to work and get fit while going from A to B.
New book examines the sports-science industrial complex.
Agonizing, efficient interval training on two wheels.
Meet the world's first smart commuter bike.
Biking to work boosts happiness, says study.
Chef tweets what riders are eating when they dismount their bikes.