With her fitness program for women, 4-time boxing world champion Christina Hammer shows how to keep your body healthy and fit. The self-developed training is based on exercises from boxing.

A full burnout session that pushes you way past your limits.

Instability-plus-isometric contraction to build a rock solid platform.

Increase your range of motion and maximize your results from every routine.

Using Dynamic Set Training, this workout is designed to improve strength in your calves, quads, hams...

We're not talking crunches. This workout will challenge your midsection in ways you've never experie...

Designed to shape your shoulders, build your biceps, and create more defined triceps, these super an...

This workout has only five exercises, but by the time you’re done, you’ll have completed more than 3...

21 Day Fix Extreme - Obsessed with Fix.
It doesn't matter how fit, enthusiastic or prepared you are, when it comes to trying out a new form ...

You’ll need an agility ladder for this workout, which uses fast footwork and dynamic total-body move...

This workout lives up to its name with nine rounds of kicks and knee strikes that will work your leg...