I feel that the underlying message of this movie is very inspiring...and not at all revolve about body image/body shaming or something like that...it's a beautiful story about how an introvert girl found meaning in her dull life through discovering her liking for boxing..her body transformation was the part of the process...she worked insanely hard to achieve her goals and finally achieved it (though on her own ways)..the ending was so realistic..she was not the winner of the boxing match that she played against the professional fighter, but a winner in conquering her insecurities.............