Grimek often cautioned readers of Strength and Health against overdeveloping the pectorals. He wrote,
"I am not suggesting that these muscles be ignored . . . they shouldn't be. But neither should they be developed beyond other proportions and infringe upon the body's symmetry. Body symmetry is more important and is the sole factor by which one physique is more outstanding than another - never overdevelopment of some muscle group."
The York strongman also warned that overdeveloped pectorals may begin to sag and acquire a flabby look, especially as the lifter approaches middle age and / or if he fails to train regularly.