A woman is performing a Pilates exercise on a reformer machine. She is in a plank position with her hands on the foot bar of the reformer and her feet on the moving carriage. She is wearing a black tank top and black leggings. The reformer machine is silver and white. The room is a Pilates studio with other reformers and equipment visible in the background. The woman's hair is pulled back in a ponytail. She is focused on her movement. The exercise involves extending her legs and then bringing them back in while maintaining a plank position.