I hate treadmills and cardio bikes, but use them often! I also have bad knees and ankles, but still hit my hill workout once or twice a week. Finding the right hill may be your toughest challenge for this workout.
Find a hill that has a decent incline and is big enough for you to run
across for at least 200 yards.
Mark your start point, or make sure you know where it is.
Sprint up the hill 20 to fourty yards, then jog at that level about 200 yard, and try to recover, jog as slow as you want, but running sucks so the faster you jog, the sooner you eat! (if you are running a set number of laps, we run for a period of time, 1 HR)
Once you have jogged the hill across far enough,
walk back down to the base of the hill. (walk so you do not fall down the hill!)
Jog back to your start point, and start your
sprint phase again. Repeat
WE do these runs for about an hour, and our loop is almost a quarter mile. We hit from 4 1/2 to just over 5 miles, but speed is only important on the sprint. Try not to stop, no matter how slow you jog! Take some Motrin, you may be sore the first few times!
FIGHT HARD!