Muscle Testing
It has been demonstrated that manual muscle testing can be used to access the physiology of the body, including the physiology of an emotional response, and that muscles — which initially test strong in the clear — will test as being inhibited (weak) when words are spoken that have a ‘charge’ or stress-response associated with them.
Visit https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1847521/ for a paper ‘On the Reliability and Validity of Manual Muscle Testing’ by Cuthbert and Goodheart.