MORE MARC: Anyone who has seen a magazine in the past year knows that Marc Jacobs clearly revels in his newly fit physique. But to his displeasure, the fashion world at large has mixed reviews. "Why is there this division all of a sudden between people in support of me and people against me? How did this happen? I haven't done anything to anybody! I look at Karl Lagerfeld and John Galliano — everybody has their shtick. And just because this wasn't my shtick two years ago, it's a problem."

Jacobs is profiled in the May issue of GQ, by magazine alum (and current Marie Claire executive editor) Lucy Kaylin. The story, "Marc Jacobs Doesn't Give a F***," also hits GQ.com today. Jacobs told Kaylin that, in the past, he didn't have a budget in his psyche for self-maintenance. Then he got ulcerative colitis, the disease that led to his father's death when Jacobs was young, and a nutritionist recommended a diet and exercise regimen that he became enamored with.

"The thing I love about the gym is not having to make choices," he notes. "My trainer says, 'You're gonna lift this; you're gonna do that 10 times.' OK, great — just tell me what to do and I'll do it. It's the same thing with my nutritionist. All I have to do is follow instructions. I love that. This is not about 'Would it be better in red or blue?'"

Robert Duffy, Jacobs' business partner, also talks to Kaylin at length about the trials of working with the designer. "Marc is a very emotional person, and he takes his work extremely seriously. Some days it's hard and some days it's not — it depends on his mood swings. I don't know if you've ever worked with a drug addict....Even though he's been in recovery now for a while, it's not an easy process. There's the continual process of staying sober."

And of course, there is gym time with Jacobs and his trainer, known as "Easy." "Because my name wasn't Dolce or Gabbana, he [Easy] had no idea who I was," snarks Jacobs. Easy encouraged Jacobs to incorporate a little "bling" into his life. Now, they have practically matching Rolex watches (Easy's was a gift from Jacobs). "We're BFFs," says Jacobs.

— Amy Wicks