If you ask 100 different male models "how they got their body?", you are likely to hear 100 different stories. The fact is, everyone who has a body that is in great shape had to deal with their own unique circumstances to get the body they have.
It's possible that some male models did not even undergo any fitness training to become a model because they would have naturally possessed the right look that is required for the job due to their genetics.
Although male models would have done things differently to get the body they have, they all have one thing in common - they all aim to obtain and maintain a body that looks attractive.