Fabulously fit: Taking on multiple sets of jumping jacks, burpees, push-ups and sit-ups in her stride, the show's trainer was compelled to exclaim, 'look how strong that woman is!'
Sweat session: The 48-year-old put her all into the workout, showing the contestants how it's done
Exercise expertise: Michelle Obama's guest appearance on the show is part of her 'Let's Move' initiative
White house workout: The First Lady hosted an exercise session with The Biggest loser contestants, showing off her skill with multiple sets of squats and one-legged push-ups
Toned torso: Showing off her famous arms, the Fist Lady looked fit, healthy and glamorous with the show's trainer before her workout