The late Michael Jackson was working hard to try and improve his stamina for his 50-date residency at London's O2 Area, his trainer, Lou Ferrigno said Tuesday.
The Thriller star was focused on "conditioning, toning, and increasing his flexibility and stamina for the summer slate," The Incredible Hulk star told People.
"The workout wasn't any heavy resistance. A lot of stretching and a light walk on the treadmill -- being 50, his body went through a lot of stress getting ready for the tour, but he was awesome."
Ferrigno, who had previously helped train the late Beat It singer for a 1994 tour, said the grim news still hasn't quite sunk in.
"I was devastated," he said. "I mean I was shocked. I still think of it as like a joke or a like a dream."