the 27-year-old actress , who welcomed her first child with ryan reynolds in january , has been out and about promoting her upcoming movie roles -lrb- and her new figure -rrb- .
so what 's her secret ? long walks , yoga , hiking ... and chocolate , it has been revealed .
so small , gentle workouts feel better .
' since welcoming her daughter , she has shunned the gym in favour of al fresco activities .