SARA GROSS When this mom of twins had her C-section, her doctor told her she’d never seen a stronger core. Check out Sara’s story now. Plus, learn how to win a two-month regimen of Macro-E, the skin care company Sara works with.

My sister took me to my first Pilates Plus class in West Hollywood in 2005. Sebastian was teaching that day and I was instantly hooked. However, in 2008 I moved to the Marina and I stopped going -- the commute was just too much. I still did cardio 5 days a week, but I really missed the strength I felt from going to Pilates. Then a girlfriend told me about The Studio (MDR).

I loved how I felt after my first workout. Even though I was technically in shape, I was amazed at how challenging I still found the classes. Don’t get me wrong, there were times I wanted to give up (plank to pike is NOT my friend). But the teachers kept pushing me to keep going. When I could get through the 75-minute class without stopping, I had never felt better about myself. I was able to get in the best shape of my life for my wedding in November 2011, and then I promptly got pregnant with twins. Thankfully, that's right when the MegaMamas class launched and I -- with Jessi's amazing support -- was able to stay in shape throughout my pregnancy. My doctor actually told me the reason I was able to go full term was because of what great shape I was in. In fact, when she did my c-section, she said she had never seen a stronger core. It was my proudest moment (for various reasons).

SARA GROSSI took a break for six months after the twins arrived. My first class back, I was so frustrated because I couldn't do many of the things I used to be able to do. But I realized that it would take time to get back to where I was, but to trust that I would get there. I am still working on it, and I am committed to squeezing class in whenever I can. Two weeks ago I was able to make it through a class without stopping, and I know it's just going to keep getting better.

The studio has given me confidence in my body and my personal life that I never knew I could have. About two months ago, I partnered with the doctors behind Proactive in their anti-aging skin care line that is expanding all over the country. And I can give away a full two-month regimen of Macro-E, which has been featured in Allure, People, O Magazine, and more, to one lucky Studio (MDR) client. For more info, contact me at The first two people to e-mail me will win!