There has been a randomized controlled trial to test if parachutes reduce injuries when jumping out of planes. However, it found that parachutes do not reduce

There has been a randomized controlled trial to test if parachutes reduce injuries when jumping out of planes. However, it found that parachutes do not reduce injuries: https://www.bmj.com/content/363/bmj.k5094 https://www.bmj.com/content/363/bmj.k5094