As a result of several randomized clinical trials over the last decade, hospitals and ambulance staff have seen a significant reduction in the number of patients that are being immobilized. This has been due to complications such as increased intracranial pressure with traumatic brain injury, along with access issues for airway management in obtunded patients. Some medical professionals have even been calling for a ban on cervical collars, stating that they cause more harm than good. There is also very little evidence that shows cervical collars to be actually making a difference in traumatic cervical spine injury. In high-risk motorsports such as Motocross, go-kart racing and speed-boat racing, racers often wear a protective collar to avoid whiplash and other neck injuries. Designs range from simple foam collars to complex composite devices.