Links to info on hill running:
1. RW article “Can hill running make you faster?” found at:
http://www.runnersworld.com/article/0,5033,s6-197-0-0-7519,00.html
2. RW article “Hill Running” found at:
http://www.runnersworld.com/article/0,5033,s6-51-54-0-1063,00.html