Justin Timberlake Flexes His Muscles During Sweaty Workout After Britney Spears Dances To His Music

hollywoodlife.com:

Justin Timberlake didn’t need any music to keep him amped for a hard-core workout session with his personal trainer.

The singer turned actor shared a video of him doing heavy weighted standing arm pumps to his Instagram account on Jan. 28. The 39-year-old preferred his workout with just the sound of his personal trainer Ben Bruno telling him to up his reps.

JT plays a tough but ultimately caring ex-con in his new Apple+ movie Palmer, and apparently wants to keep the bulked up body he worked on for the role.

As JT grunted while pushing the stack of weights up and forward with both hands, then bringing it back to his body with just one arm, he grimaced with perseverance. “Try six,” Bruno told him to get one more rep out of Justin before