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Mark Wahlberg to answer fitness questions during live webcast

Mark Wahlberg launches new nutrition line with GNC, MARKED. MARKED

(CBS News) Mark Wahlberg will be hopping online Thursday to answer fans' health and fitness questions in conjunction with his new sports performance line MARKED that he developed with GNC.

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The "Ted" star will be joined online by co-host and Men's Fitness Editor-in-Chief Michael De Mediros as he answers in a live webcast  questions about his own fitness regimen and the benefits of a healthy lifestyle.

The 41-year-old father of four told CBSNews.com that he had wanted to break into the health and wellness business for a while, saying "fitness has been a big part of my life since I was very young."

For MARKED, Wahlberg explained that he was able to use "the best scientists, ingredients and formulas" when he partnered with GNC. The actor even tested out the products himself when he had to prepare for movie roles that required major physical transformations.

For his new film "Broken City," which comes out in January, he had to be as thin as possible and for "Pain and Gain," which comes out in the spring, he had to bulk up to play a bodybuilder.

Wahlberg's live webcast takes place on Thursday at 5 p.m. ET.

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