My legs and arms are strong from riding and lifting stuff and whatnot, but I need tips on how to get my core all "toned up". I've started back into skipping and running; are those things good for your abs or more your legs? Also, is biking a good workout? Everything I do around home (lifting bales, saddles, carrying heavy buckets etc) only seems to go to my arms and legs. I used to be able to run any distance at track and finish in the top three and was on a skipping team in elementary school, which involved us skipping for almost an hour straight. I don't know how I got so out of shape..