199 – SuperCrossFit

A panel from World's Finest #7, July 1942
A panel from World’s Finest #7, July 1942

In the Superman story of World’s Finest Comics #7 (July 1942), Superman is shown spending time in his “mountain retreat”, working out and staying fit. This is the first sort of expanding of the Superman storylines to feature things he would do in his off-hours between adventures.