Which of the following is not a physiologic effect of the warm-up stage of exercising?
a. increased muscle temperature
b. increased oxygen transfer from blood to working muscles
c. increased muscle viscosity
d. increased muscular enzyme activity
Answer: c. increased muscle viscosity
Increased muscle viscosity is not a physiologic effect of warm-up; rather, muscle viscosity is decreased during the warm-up. The other choices are all effects of the warm-up and also increased elasticity of muscles and connective tissues.