MKE WA RAIS OBAMA KWA MAZOEZI NI HODARI MNO !

Fabulouslyfit: Taking on multiple sets of jumping jacks, burpees, push-ups andsit-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

Whitehouse workout: The First Lady hosted an exercise session with TheBiggest loser contestants, showing off her skill with multiple sets ofsquats and one-legged push-ups

Tonedtorso: Showing off her famous arms, the Fist Lady looked fit, healthyand glamorous with the show's trainer before her workout.