Jessica Biel's Slim Post-Baby Body Secrets Revealed! Actress Gets $5,000 Treat Form Justin Timberlake

Jessica Biel has been showcasing her slim post-baby body just weeks after giving birth to baby Silas, and now her personal trainer, Jason Walsh, dished the secrets just how Justin Timberlake's wife did it.

In an interview with E! News, he said that new moms can check out his studio Rise Nation in West Hollywood and burn as much as 800 calories for just 30 minutes.

He said their workouts are a good post-baby regimen, and Jessica Biel is just one example among many mothers who'd like to regain their pre-baby body.

"This is a great for post-baby...Rise Nation is fantastic," he said. "Mothers, after having the kid, they really need to pay attention to the breastfeeding and stuff like that."

"She can't really lose everything 'cause she is breastfeeding. It's going to take a while. At least here, we aren't doing too much. She can kind of go at her own pace and it's fantastic."

Unlike most fans thinking that Jessica Biel is blessed with good genes that she can immediately get back her sexy body post-baby, the trainer insisted that anybody can do it.

"The great thing about the VersaClimber is its super safe. It's a natural motion; it's a crawling motion," he said. "We're all born with it. It's low-impact."

"It reinforces proper movement patters. It's the upper and lower body. I'ts huge cardio or conditioning impact. Metabolically speaking, it incinerates calories more than anything else out there."

Meanwhile, Jessica Biel certainly showcased her sexy post-baby body as she went out on a date with Justin Timberlake, said OK! Magazine.

According to the report, Justin Timberlake treated his wife to a dinner that cost him $5,000 at Wolfgang Puck's restaurant at the Hotel Bel-Air back on Aug. 1. The couple also "couldn't keep their hands off each other" during their date.

"Their night included $275 Golden Imperial caviar, a $3,500 bottle of Chateau Margaux, $56 filet mignon and $42 sea bass," it said.