"I reflect," he said. "I reflect a good deal. To run to and fro, to make the investigations, that, no. It does not suit my age, my temperament, or my figure."
Exactly this is the reason why the most recent Poirot adaption with Kenneth Brannagh has been such a train wreck of a movie. Brannagh´s Poirot is chasing suspects, he is fighting, he is running around. That is not Poirot!
I wonder if the screenwriter actually has read a single Poirot novel before writing the skript for this movie.