WEBVTT SYNERGY IS THE KEY WORD....WHEN IT COMES TO TURNING THE CRAZY DAYS OF SUMMER INTO A TIME FOR AN INTENSE WORKOUT. IN FACT...OUR GUEST TELLS US IT'S SO INTENSE...THAT IT'S CALLED "INSANITY." ...

What can you expect from a workout dubbed Insanity? Do you really have to be nuts to try "the hardest workout fitness program ever put to DVD," as its website describes it? Probably not, but you have ...

(Update: Listen to our new podcast with more info on the Insanity workout here.) My Insanity set in my recycling bin, waiting for re-gifting (Carey Goldberg/WBUR) "Dig deeper!" Shaun T goaded me, and ...

Even if you're not a fitness buff, you're probably familiar with personal trainer Shaun T and his intense "Hip-Hop Abs," "Insanity," and "Focus T25" workouts. Now, he's back with a completely new ...

Confession: The last time I attempted the highly popular workout video Insanity, I was motivated less by a desire to get in shape than by the unhealthy mix of tequila, triple sec, and lime. After ...

So you want to train like an elite athlete? While professionals across various sports have shared their secret training methods and intense workouts, it can be difficult for most everyday gym-goers ...

I was channel-surfing early one morning when images of sculpted bodies working out together caught my attention. It wasn't the first time I had seen this Insanity infomercial, but it was the first ...

Insanity came by airmail, bound like a prized first edition. The first time I tried it, it didn't seem too bad. A little sore in the thighs maybe, a little weak in the hip flexors, but nothing ...

Shaun T. is the mind behind the viral "Insanity" workout. In his new book, "T is for Transformation," Shaun talks about what motivates him to exercise. Shaun told Business Insider that you shouldn't ...