A fit young woman sitting on a black gym mat in a butterfly stretch pose, wearing a black sports bra and black shorts. She has long straight hair, a calm and confident expression, and is in a modern gym with fitness machines and weights in the background. The lighting is natural and slightly moody, with soft shadows highlighting her toned physique. The perspective is frontal and centered, with the woman as the main subject and gym equipment slightly blurred in the background for depth. High-resolution, photorealistic, 4K detail.
