Oooh hills. Man, they get me every time. Is it the same for you? I've been attempting them lately. And after my last workout, I got home and flipped my Runner's World calendar over to May and look what I read:HILL REPEATS
Workout: Run for 1 minute uphill, rest for 30 seconds at the top, run down the hill at a faster than average pace, and rest for 2 minutes at the bottom. Repeat four times.
Variations: Try to go farther in one minute, or try to get up the hill faster. In inclement weather, run up stairs.
Benefits: Increased speed, strength, and running economy.