I'm training for a half marathon and need a rotation! I will be running 4x/week. I've got all the videos and am thinking of the GS series, the PLB/PUB/ME series. I'm not sure what to do for crosstraining....either elliptical or a low impact Cathe video I guess. Or how would just plain walking be? Too similar to running? Weight loss is my goal along with finishing the race obviously. I've done a search and now I'm even more overwelmed! Seems like some lift heavy, some lift for endurance, and everything in between. I've really cut back on the weights lately and noticed I'm losing alot of my tone which I absolutely don't want to do. Any advice will be welcome!