I'm so glad you posted this question. I'm new to the website and relatively new to biking. I live in Central Arizona and it's nothing but mountains here. I started riding to work a few years ago then stopped because I changed jobs and the commute was much longer and the I started again and stopped because of "lack of daylight" and . . . . well -- anyway -- I started up again about 3-4 months ago. Anyway --- the hills just don't seem to be getting any easier, especially at the end of my work day. The commute home, while it has its ups and downs, is essentially a 10 mile climb and always into a head wind. I make it, but by the end of the week, I'm destroyed!! Any suggestions on building my strength/endurance/speed? Thanks -