i've been thin for my whole life, RAIL thin as a kid but in college i got some slight curves. right now i'm 5'6 and between 125-130lbs (haven't weighed in a while so i'm not sure), so i basically look thin and in shape. however, i don't have any muscle definition. i really like the look of women my size who just have some slight biceps/defined leg muscles. i couldn't find any good pictures for examples, but one example is stacy london from the show "what not to wear"... she just looks thin and healthy but when she flexes her arm you're like holy crap she works out i work out pretty often, enough to stay healthy, but i usually just run on the treadmill or some other kind of cardio, and MAYBE do some arm weights. the one problem i face is that our apartment complex's gym is pretty lacking; just a treadmill, elliptical, reclined bike, and some weight machines. i'd like to join a better gym at some point but right now i'm trying to budget. if anyone has any ideas for what i should do for a workout schedule i'd really appreciate it!