but performance increases with rising temperature (Q₁₀ of 2-4) to a maximum performance level and thermal independence (Q₁₀ of 1.0-1.5). With continued increase in temperature, performance decreases rapidly (Q₁₀ of 0.2-0.8) up to a maximum temperature at which all biological function again ceases.

Within vertebrates, different skeletal muscle activity has correspondingly different thermal dependencies. The rate of muscle twitch contractions and relaxations are thermally dependent (Q₁₀ of 2.0-2.5),