legs bums & tums... how many calories?

I just log it under cardiovascular as "Strength training (weight lifting, weight training)"... but when I do a lower body workout, I'm doing 6-8 reps, heaviest weight I can manage, to failure, and sending my heart rate repeatedly up to around 80% of its max. As long as that heart rate is up, I'm counting it as minutes towards my burn. If I rest too long, I shave a bit of time off in logging it. I'd rather underestimate a little, than overestimate.

There are a lot of ways of "doing" legs, though, so how you log it depends on just what you're doing. Ask yourself if it's fairly easy, moderate, or really vigorous (like, you really can't safely push yourself harder). It's generally a mystery to pretty much everyone, exactly how much they burn doing certain exercises. There's a lot of trial and error in logging, I'm sure. You can probably find some examples through some online research of typical calories burned, for your weight and gender, for different activities. www.livestrong.com is a good place to start for articles to estimate just how strenuous of a workout you are doing, amongst others, and from there you'll get a better sense of what you burn.

Edit: Whoops, it's late. I see that it's a class. I'd probably put it under aerobics, then, as suggested. My above advice still stands, regarding how strenuous it is.

I've made my own exercise and called it legs bums and tums and I log it under that with the amount of cals I burned. x