"Johann Christoph Friedrich GutsMuths, also called Guts Muth or Gutsmuths (9 August 1759 – 21 May 1839), was a teacher and educator in Germany, and is ...
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especially known for his role in the development of physical education. He is thought of as the "grandfather of gymnastics" – the "father" being Friedrich Ludwig Jahn. GutsMuths introduced systematic physical exercise into the school curriculum, and he developed the basic principles of artistic gymnastics." - (en.wikipedia.org 15.02.2022)