This pose is called the "Purvottanasana". The English name would be, "Upward Plank Pose" or the "Intense Eastward Facing Stretch" or you can just call it, "making a right angled triangle with your body".
Photographer @hegreworld
Model @lubashumeyko
Made on high quality A3 Ecological Recycled @fabriano1264 paper, 120 gsm with @fabercastellglobal 9000 Art Pencils.
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