Rivera says she gained 60 pounds while pregnant, but once the baby was born, she was ready to "get back to business," crediting breastfeeding
for helping her lose the first 30 pounds. "My closet was divided in half: On one side were maternity clothes and on the other side were clothes I thought I would never wear again," she shares. "I’m not really self-motivated. And I don’t know what to do at the gym. I always feel lost. [Without a trainer] I’d probably just end up not working out, and then go to the steam room."