Madonna trains for two hours a day, six days a week.

The “Material Girl” singer, famed for her sculptured body, works hard with personal trainer Tracy Anderson to maintain her physique but is careful she doesn’t look too muscular.

“We train for two hours six days a week. We do 45 minutes of dance aerobics, followed by work on muscle tone, flexibility and definition. There’s no running and no weights bigger than three pounds, because Madonna doesn’t want to bulk up.”

Although Madonna has drawn criticism for her toned arms in recent months, Tracy insists she has a “perfect” figure and looks better than American First Lady Michelle Obama.

“Madonna’s body is perfect. She has no fat, no cellulite, she is so toned, and her arms are amazing. Michelle Obama’s arms look beautiful, but I think I could get her into even better shape.”

Tracy also trains Madonna’s friend Gwyneth Paltrow and recently praised the actress’ dedication to her exercise regime: “In the past, she’d had times when she was very, very thin, but never this toned. Her definition is unreal.”