Hiro11

There's a ton of stuff out there. I think there's increasing agreement that current standards and testing protocols are at best incomplete in measuring the effectiveness of a helmet in preventing injury. It's great to see the increased focus on real-world safety in bike helmets.

This podcast episode with the head of Kali Protective. This is dry material, but it gives good insight into the limitations of standardized helmet testing and the various pluses and minuses of the tests and standards used: https://cyclingtips.com/2020/04/nerd...nd-chain-lube/

Bicycling Magazine recently published an article on this meta study in Biomedical Engineering on the topic:
https://www.frontiersin.org/articles...21.718407/full
This is a statistical review of 148 different drop test studies. The authors point out that results can vary widely due to the lack of standardization in helmet testing (one example: many tests don't use a "neck surrogate" and as a result may not accurately model real world impacts). Also they show that while rotational impact mitigation systems like MIPS seem to really work, the various tests and standards used render a consumer's ability to compare the actual performance of helmets very difficult.