Oooh,
Artemis, I'll have to check that out! I take it that it's available on iTunes?

I listed to my iPod on the treadmill anyway, so that should be nice!
For those of you doing C25K, do you think it's possible to do all the workouts on the elliptical? I can't jog, even on a treadmill, because it kills my knees.

I'm doing PT for them, but I don't see jogging or running anywhere in my future.
My nutritionist suggested that the best way to get my metabolism working better was to do 30 mins of cardio (not including warm up/cool down), at a decent intensity (where you're still able to talk...your heart rate is up, but it's not insane), then do a burst of really tough activity for 8 minutes in the middle. So that means 11 mins of exercise, followed by 8 of really intense exercise, followed by 11 mins of regular exercise. I did it on the elliptical. I raised the incline and the resistance, then went really fast and hard for the 8 mins. It was tough, but it really seemed to work.
However, after a year of doing that 3+ times a week, my body was too used to it, I feared. I talked to a lot of the mods at our last meetup and we discussed the benefits and downsides of interval, endurance, and other kinds of training. I'd done interval training back when I first started SBD, so I decided to do that instead for a while. I use the interval setting on the elliptical. When the incline goes up, I go much faster. When it goes back down, I slow down. I'm always at a cardio heart rate (sorry I don't know what that is...I just use the monitor on the elliptical and how I feel as a guide) but when I do the intense interval, I end up at the very top of my range. It's exhilerating and fun for a change.
That said, some of the chicks at the mod meetup extolled the virtues of picking a heartrate level and staying right there for 30 mins (or more). They said this is helpful too.
Overall, I think a variety of exercise is really important. If you love Jazzercise (which is SUCH a great workout!),
Chelby, you could try doing cardio in between strength training (or circuit training) on the days when you don't do Jazzercise.

I know it's a really major organization, but is there any way you could talk with the people above you to see if there's any chance of developing an interval training workout for Jazzercise?