Jenna Dewan Tatum called her personal trainer "the second" she found out she was pregnant, and worked out well into the third trimester of her pregnancy.
The health conscious actress and dancer - who has seven month old daughter, Everly, with husband Channing Tatum - says working out helped her keep focused while pregnant with her first child.
She told Us Weekly magazine: "The second I found out I was pregnant, I called [my trainer] Jen Johnson. We found areas we wanted to target: arms and legs. I wanted to keep the muscles alive. Plus, I felt so much better. Working out kept me sane. I would feel a burst of energy and all my hormones would regulate."
Even during her third trimester, while she was with Channing filming 'Jupiter Ascending' in London, Jenna, 33, kept up her routine.
She added: "It was tough doing anything strenuous, so I did yoga and a lot of walking. I must have walked the city four times over! I'm sure people thought I was crazy - I'd be walking my dogs on Hampstead Heath park, I'd grab a tree and do 10 squats. By the end I was so ready for her to come out. I was reading old wives tales and eating spicy food and pineapple."
Even after Everly's birth in May, Jenna didn't slow down, and even exercises while rocking her to sleep.
She added: "My doula [childbirth assistant] gave me the best tip: When I'm rocking Everly to sleep, I do lunges across the nursery, squats or calf raises. Suddenly 45 minutes have gone by, she's asleep and I got a little workout!"