Take a look in the issue Popular Science
People love doing crazy things. Let's keep it that way!
There are now two types of helmet to choose from. The old style and the new generation, equipped with the Multi-directional Impact Protection System. This is a revolutionary technology, ensuring that a helmet with MIPS provides much better protection than any other helmet on the market. To identify the new generation of helmets, always look out for the little yellow MIPS logo. Risk is a part of life. Choose a helmet that can handle it.
Finite Finite Element model (LSDYNA) of the human head showing the maximum principal strain in the sagittal plane (Kleiven et al. 2003). Software: LSDYNA by courtesy of ERAB, Sweden.
So go ahead with whatever you do. Your brain has never been in better hands.