Keep Fit is a 1937 British comedy film directed by Anthony Kimmins and starring George Formby, Kay Walsh and Guy Middleton.

[1] George Formby again plays his working class underdog, gormless, gullible, indefatigable and triumphant hero.

A weakling, Formby's character overcomes obstacles to beat a corrupt rival in the boxing ring.

He plays a scrawny barber's assistant who, in response to the keep fit fad sweeping through Britain at the time, dreams of a better physique, and sings of it in the catchy "Biceps, Muscle and Brawn".

[2][3] According to Sky Movies "it's a bouncy, confidently made comedy that's fun throughout and pretty hilarious in its boxing-ring conclusion".