Multiple studies demonstrate that human reaction speed can be naturally accelerated through non-pharmacological interventions such as targeted physical exercise, cognitive-motor training, virtual reality, and neural synchronization.
The retrieved papers consistently support the claim that human reaction speed and cognitive performance can be naturally improved or accelerated without drugs, utilizing methods such as specialized physical training, HIIT/Tabata protocols, virtual reality, and cognitive-motor dual tasks. None of the papers refute or undercut the claim.