Britney Spears shares video of grueling workout set to the tune of her 2013 hit Work B***h

dailymail.co.uk:

Britney Spears channeled her growing frustration with sister Jamie Lynn into fitness as she endured a grueling workout at her Thousand Oaks home on Tuesday.Sharing a montage of her session to Instagram, the 40-year-old popstar performed a number of moves in her gym before heading outside for some fresh air and sunshine.Indulging in a little self-promotion, Spears set her video clip to the tune of her 2013 hit Work B**ch which is featured on her eighth studio album Britney Jean.

Fitness fiend:Britney Spears channeled her growing frustration with her sister Jamie Lynn into fitness as she endured a grueling workout at her Thousand Oaks home on TuesdayThe Toxic hitmaker flashed her toned tummy in a pale yellow sports bra with black lining and a pair of black booty shorts.Her newly-dyed purple hair was swept up in a ponytail and she had on a pair of gold-framed aviator shades for the duration of her workout.

Britney finished off her gym look with a pair of grey lace-up sneakers.The one-minute video first showed the singer warming up with a few stretches before performing some moves on a foam pad and a fitness ball.

Impressive:The icon was able to perform a backbend in the clip, which highlighted her incredible strength and flexibility Inspiring:Sharing a montage of her session to Instagram, the 40-year-old popstar performed a number of moves in her gym before heading outside for some fresh air and sunshineShe challenged herself by skillfully performing several pull-ups to workout her abs.Bringing weights into the picture, Britney was seen utilizes several different size dumbbells as well as a barbell to workout out her back, chest, and arms.Not wanting to skip out on cardio, Spears put in some time on the treadmill before.