Go to infographic overview[/button_2] Getting leaner means more insulin sensitivity means more muscle mass.

Is this actually true? Probably not. And for 2 reasons.

First, no existing research shows insulin sensitivity improves when a person gets leaner beyond 20% body fat (30% in women) [Votruba 2010].

Second, even if insulin sensitivity would improve from getting shredded (which it probably doesn’t), this sensitivity is not related to less fat gain or more fat loss [Gjelstad 2012].

As expected then, it was also not related to better muscle-to-fat gain ratios in an identical twin study, the one I mentioned in my previous post [Bouchard 2014].

Getting leaner to set the stage for gaining more lean mass is a great idea, as it optimizes testosterone and estrogen levels.

Bulking when you’re “skinny fat” is like trying to cook in a dirty kitchen: better to clean up first to cook much more efficiently.

How much cleaning up you should do exactly? Read my newest article about the ideal body fat percentage to bulk.

Go to infographic overview