There are some of us who still can't quite believe that New York Fashion Week is upon us once again, but for the models hitting the runways this week, preparation is well underway—castings and fittings, yes, but also doing everything to ensure that their bodies are in top form to take the catwalk. For this, many of the industry's top faces (including Karlie Kloss, Martha Hunt, Irina Shayk, and Miranda Kerr) rely on modelFIT, the gym opened last year by Justin Gelband and Vanessa Packer in NYC.

We've done the modelFIT workout before (and loved it), but of course, that's just one part of the fitness equation. So an important question remained: What does a runway model eat when she's prepping for weeks of runway shows? That would fall to Packer, who heads modelFIT's nutrition and wellness program. Here, she reveals her insider tips to keeping her model clients slim and energized. (Spoiler alert: There is chocolate.)

  1. It's not how many calories you eat, but how you eat them.
    "I never count calories. I base my meal plans and system of eating on seasonality, alkalinity, and food combining. The last is probably most important, because it ensures proper digestion: With food combining, it's important not to mix proteins and carbohydrates in the same meal as it will impede proper digestion and cause bloating, gas, and constipation."
  2. Your meals should start light, and get heavier as the day goes on.
    "Begin your day with warm water and lemon followed by a juice or smoothie, which will boost alkalinity