Uncrowned is a new destination for all things MMA, boxing, wrestling, and more, featuring Ariel Helwani. When we train our athletes at Ultimate Advantage Training, we prioritize strength and power.

Improve speed, agility, and court positioning with simple cone footwork drills used in tennis training. #Tennis #Footwork ...

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 ...

Luis Badillo Jr. isn't a professional athlete—at least, not in the sense of playing a major sport for a living. That being said, the Miami trainer has the fastest, most agile feet we've ever seen.

Development of the cardiovascular system helps to ease transition into the next phase while decreasing the chance of injury and delaying the onset of fatigue. The next improvement in this stage is ...