1911 Encyclopædia Britannica, Volume 16… (1911)
“ Broadly speaking, there have been two streams of development in the Swedish gymnastics founded on Ling’s beginnings—either in a conservative direction, making certain forms of gymnastic exercises subsidiary to the prescriptions of orthodox medical science, or else in an extremely progressive direction, making these exercises a substitute for any other treatment, and claiming them as a cure for disease by themselves. Modern medical science recognizes fully the importance of properly selected exercises in preserving the body from many ailments ”
