Seems like the easy part is going to the gym and tearing your muscles to pieces, shouldn't it take longer than a week for your body to fully recover from a workout?

In the old days they often trained full body 3 times a week.

"Harry," I explained to him. "You oughta do some power training and bulk up."
"What for? He asked. "The girls think I'm terrific already."
"Terrific?" I said. "You're weak as a kitten."
"Yeah," he said. "But the girls don't know that."
"Girls?" I shouted. "You got nothing on your mind but girls?" I tapped him on the chest. "Get this! Suppose you're walking home with a girl tonight. And suppose some big lug steps out of an alley and drags her away. What do you do then?"
"Easy," he said. "I slip down to the beach tomorrow and get another one."