Doing your exercise takes x calories. It doesn't take x+1 because you did something else first.
You should, as indicated below, always warm up first with a little cardio, but then what order you do the work parts is up to you.
I recommend ST first, because it's the most likely to injure you if you are tired already from previous work and do something wrong.
Generally speaking though, I recommend doing one on one day, one the other, so there's no issue. There's no need to do both cardio and strength in the same session.
Fitness Minutes: (8,190)
526 4/12/11 2:52 P
I am following New Rules of Lifting for Women and the author recommends doing a short cardio warm-up before lifting, then do your strength training, then finish with 15-20 minutes of HIIT (interval training).