You are the athletic trainer at a rural high school. One of…

You are the athletic trainer at a rural high school. One of the running backs sustained a concussion in the last game about 2 weeks ago. They have started to show signs of a vestibular clinical profile. You determine that they are showing balance dysfunction. To treat the balance dysfunction you have the athlete stand with their feet together and eyes closed for 45 seconds. They report afterwards that it was easy. What would be the best next step to increase the difficulty?