The image shows a group of three people in a gymnasium with blue mats on the floor. They are performing a plank exercise with green exercise balls. The person in the front is wearing a black hoodie with a white logo on it and black pants, while the person on the left is in a blue t-shirt and gray pants, and the person at the back is in an orange shirt and black shorts. All three people are in a crouched position with their feet shoulder-width apart and their arms stretched out in front of them. In the background, there are several large white exercise balls and a large window.