Barbie Hillz, a young flexible and nice looking girl has caused a massive reaction on Instagram with her body fitness training.
In the video, she was spotted in the gym working out on her body fitness.
She gave a short note on how to exercise and keep fit always.
Passive stretch or passive flexibility training is a type of stretch in which you stay in one position for a period of time.
You can relax your body while a partner/accessory/prop intensifies the stretch by putting external pressure on you body.