Men’s blogs are rated using different criteria by different websites. They all depend upon metrics provided by the various traffic monitoring tools available online. Link popularity could also be one of the factors given that the more links from reputed sources a website related to men’s health enjoys, the more popular a website is considered to be.
So, to most websites that rate sites from certain niches, the top 50 best blogs for men are those that get more links from these sources. But that's not it as links can also be manipulated so user ratings also count.
Its therefore important to compare lists of the top 50 best blogs for men from different ratings related sites so you get a good and a complete picture of how a certain website is regarded by different people and different websites.
The thing for you to remember is that, not every blog related to men’s health will be rated in the same way nor would every single blog have the same type of information related to certain issues that you may need addressed. This is the main reason you would require access to different blogs related to men’s health or any other matter of concern to men in the hopes that at least a few of them would have relevant content.