[1][3] Herodicus believed that exercise and a good diet are key foundations of health, and emphasized the use of both to treat various ailments.
[2] Herodicus noticed that weak wrestling and boxing athletes gained strength when subjected to rigorous exercise.
[1] Herodicus is believed to have authored the Ars Gymnastica, a series of gymnastic exercises he used to treat febrile conditions and other illnesses.
[5] Euryphon, a mentor of Herodicus at the medical school of Cnidos, emphasized the importance of diet in maintaining health.
[1] A failure to move after eating could cause a humoral imbalance between what Herodicus called "sharp and bitter" liquids.