"Who needs more?" Faltskog asked, with a laugh, adding: "I found I was getting tired easily. And I wanted to find that old feeling when you work with the stomach muscles. Suddenly, it was there."
Faltskog said she no longer lunges toward her radio-preset buttons at the first strains of ABBA's Top 40 evergreens such as "SOS," "Take a Chance on Me" and "The Winner Takes it All."
"And now when (the music) comes back, (I remember) the hard work behind it," she said. "The quality was very good."
ABBA, which included Anni-Frid Lyngstad-Reuss, Benny Andersson and Bjorn Ulvaeus (Faltskog's ex-husband), has sold more than 300 million albums worldwide. The group is celebrated in ABBA The Museum, which opened last week in Stockholm.
While there aren't plans for ABBA to reunite, Faltskog said band members do keep in touch.
"I met Frida last summer on vacation, and we got very nostalgic," she recalled. "And Bjorn and I see each other rather often with the children and grandchildren."
Faltskog even went over to Andersson's studio to give him an advance listen to "A."
"He was thrilled," Faltskog said.