These are the posing pants used by Ernest Allen, From New Whittington, Chesterfield.
Ernest won many awards and competitions for body building and muscle control in the 1930s and 1940s. In 1939 he was a finalist in Europe’s Best Developed Man contest, held in France at Le Tourquet, and turned professional in 1946.
Ernest’s professional name was Strohngzael and he performed at the Hippodrome in Chesterfield, showing various poses. Strohngzael also developed a training regime for people who wished to develop their bodies or get fit.