Destiny’s Child’s gruelling training regime revealed

Beyoncé sang while running on a treadmill as part of her Olympic-style workout with Destiny’s Child.

Her former bandmate Michelle Williams, 43, said the grueling mix of stage and exercise was encouraged by Beyoncé’s father, Mathew Knowles, 70, who used to manage the R&B group.

Williams told Australia’s KIIS FM: “That was a workout for all the girls in Destiny’s Child.

“The [Mathew] he was a great coach. He would compare him to a coach who wanted to make sure his team got the championship.”

Destiny’s Child, which also featured Kelly Rowland, formed in Houston, Texas, debuting in 1997 with the single No No No before disbanding in 2006 after racking up 60 million in record worldwide sales.

They have been refurbished for various live performances, including the Superbowl in 2013.

Williams opened up about her past in the band after she was unmasked on the Australian version of The Masked Singer on Tuesday night.

Former Spice Girl Mel B was speechless after she managed to guess the singer’s identity, exclaiming, “I knew I knew that voice. I knew her. I knew her. You’re amazing.”

Williams replied, “From one girl group to another girl group that is the role model that paved the way.

“The times when we were in London, all those times in the early 2000s, we were hanging out with everyone, but not the Spice Girls!”

Williams also said the significance behind her rendition of “Say Something” by A Great Big World and Christina Aguilera was due to her breakup last year with fiancé Chad Johnson.

She said: “It’s no secret that she was engaged and it didn’t work out. I just remember those words. She somehow articulated this is what she wanted to say.”

“It’s until you really move it with your full voice, it was almost like therapy. And so it came about that way. That’s what music can do to you when you just let it go.”