Dumbbell Cross-Chops
Ever versatile, dumbbells can be used for just about any kind of lifting exercise. Catalyst Athletics demonstrates how to perform a cross-chop to improve your conditioning and work your trunk. 

NFL Workout Demos
Gear up for this weekend's NFL conference championships with these player-tested workouts. Tips and demos from the likes of Brian Orakpo, Greg Jennings, and C.J. Spiller reveal how the pros work on their strength, endurance, and speed. 

A Warning for Fitbit Users
Fitbit is a great way to track steps, calories, and sleep, but make sure you're not allergic to nickel. It doesn't appear to be widespread yet, but some users have reported contact dermatitis from the gadget's charging port.