Watch a boxer’s feet during a fight, and you’ll notice they never stop moving. They’re ready to shuffle or pivot or lunge or cut or rush in the blink of an eye. Being quick and light on your feet can ...

This is the first in a series of workouts from SI's Nora Tobin that will help you get in shape for tennis season. Check back here each week for the next set of drills in this month's lineup. Tennis ...

The 49ers PREP team presented by U.S. Bank is dedicated to providing drills and activities for youth to stay active at home. 49ers PREP coordinator Ryan Dillard shows how to work on your agility with ...

Athletes and coaches are often presented with various training products that guarantee a 5 inch improvement in their vertical jump or a significant increase in their overall speed. Whether or not ...