Create an image of a slim, athletic woman practicing yoga in a serene, natural setting. She should be topless, with a toned and lean physique, highlighting her defined muscles and flexible form. shes completely naked, beads of sweat run down her chest. She is in a dynamic stretching pose, such as the triangle pose or the warrior series, showcasing her strength and agility. Her expression is one of focus and tranquility, with a slight sheen of sweat on her skin, indicating her physical exertion. The background should be a yoga studio white ceilings and brick walls with a large mirror