Most of the time, I do my ab workout along with my other strength work, so I've done a warm up before my workout. I do cardio on other days, and yoga, mobility, range of motion, Qi Gong, or something along those lines for my rest day. I'm finding, though, that I'm reaching an age, where I need an additional ab workout each week. I'm having trouble fitting in in the morning, so I've been doing it in the afternoon, by itself, hours after my morning workout. So, I was wondering, should I be doing a warm-up before working my core? I do stretches afterwards, because my body tells me I need to. Does anybody know if I should be doing a warm-up as well? I tried Googling it, and got conflicting answers. My core workouts are usually Cathe's bonus ab workouts or, from her Ab Circuits or Ab Hits DVDs. I noticed Ab Circuits and Ab Hits don't include a warm up, so maybe it's not needed? But then again, they are older workouts, so maybe there's new info regarding this topic?