Shoot for 3 sets of 6-8 big movements (like squat, lunge, deadlift, pushups, pull-ups, presses, rows, and all their variations) with about 45 seconds rest between sets.
They did pushups, twirled hula hoops, and competed at dodge ball and tug-of-war before the first lady triumphed over the comedian in a climactic potato sack race.