Back To Werk! Inside Kim's Desperate Plan To Lose Her Baby Weight

One week after the birth of Saint West, Kim Kardashian is already looking forward to getting back to work — in the gym, that is!

"Kim is never as motivated to work out as she is when online trolls call her fat," an insider told Radar. "Being pregnant again has been such a huge blow to her self-esteem that she will do anything to get her body back in shape."

"She cannot stand when her sisters get more attention for being hot," the insider continued, "and seeing how Kourtney has transformed her body was hard to watch. Even though she needs to take it easy for now, she is ready to get back on the treadmill right away."

"Move it momma!" Ciardiello said. "Grab the kids and strollers and move. Go for a walk, jog around the neighborhood. Use your huge yard for workouts. You can even up the intensity with back yard sprints."

"But in order for her to keep that famous Kardashian booty, she will need to incorporate lots of squats into her daily life," Ciardiello continued. "Instead of taking the elevator in your new home, take the stairs. That will burn calories and tighten up her booty."

According to Ciardiello, who does not train Kardashian but does train a slew of A-list celebs, "Breastfeeding is a huge way for Kim to lose the weight, too. Breastfeeding burns between 600-800 calories and helps with weight loss immensely. I suggest breastfeeding for all women."

But for now, workouts can wait.

"Two of the most important things right now for Kim are to drink lots of water and get lots of sleep," Ciardiello added. "Drinking water before a meal will help her from overeating and will also give her that famous Kardashian glow."