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.

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