#OC4 Coach Jen Widerstrom's Sample Workout Move

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Get an inside look at celebrity coach Jen Widerstrom's Oxygen Challenge program.

Now in its fourth year, The Oxygen Challenge 4 has helped thousands of participants all over the world transform their bodies and their lives. This summer, we are bringing you two of television’s most celebrated experts: Jen Widerstrom of NBC’s The Biggest Loser and Karina Smirnoff of ABC’s Dancing With the Stars!

So what are you waiting for? Start transforming your life and body now.

Join the challenge today!