Short-term plyometric training improves running economy in highly trained middle and long distance runners.
Saunders, P. U., Telford, R. D., Pyne, D. B., Peltola, E. M., Cunningham, R. B., Gore, C.J., and Hawley, J. A.
J. Strength Cond. Res. 20(4): 947-954. 2006.