Hyperacceleration
From Star Trek : Freedom's Wiki
Biochemical condition that plagued the people of the planet Scalos due to radiation permeating their water supply. Hyperacceleration of biological processes caused an individual so affected to experience one second as if it were an entire hour. Outsiders who were accelerated quickly burned out, dying in a very short period of time due to cell damage. To a normal, nonaccelerated person, a Scalosian sounded very much like an insect.