We received tremendous feedback from participants in The Wall Street Journal Fitness Challenge, a six-week program developed by Arnie Kander, an NBA sports performance coach. Haven’t signed up yet?

This week's workout comes from Kevin Pabon, of GYMGUYZ. Pabon goes over the proper form to get a good boxing workout in. He stresses that form is important so you don't injure yourself. Pabon suggests ...

This short but intense routine proves you don’t need equipment to fire up your abs and build real core strength.

You're probably doing this core-crushing workout staple wrong. Here's what you need to know.