How to Develop the Muscles of the Abdomen – Strength Magazine – January, 1922

The development of the abdominal muscles is of the utmost importance to every individual, whether he realizes it or not. No system of health improvement is adequate for the purpose the name
implies that does not develop a healthy condition in the muscles of the abdomen. While no exclusive training of one muscle or single group of muscles is advisable, yet if one were to adopt such a procedure, he might well take the abdominal muscles for his subject in preference to most any other group.

Stark CenterUniversity of Texas