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Run, Wolfe, run: Jenna takes on a grueling obstacle course

Jenna Wolfe pushed herself to her physical limits in an obstacle course to benefit charity, making her way to the finish line through wet mud, up hills, over walls and through pipes.More on TODAY.com: 'Jamaican' me tired! Lester tries Jenna's island workoutJenna Wolfe kicks Natalie Morales's butt with a 10-minute workoutJenna Wolfe: What's on my workout playlist