muscle and if you want pretty muscles, do the single movement training and if you want to be a competitive athlete, you have to really hit... bill: we save curls for the girls! martha: i wants pretty muscles and compete! and, give us a sense of, what can you do at home? i think of the balance -- sort of like the squishy thing you stand on. >> yes, i love that, standing on one leg and the funny thing is you do at home, on the phone, doing dishes, at your computer, stand up and stan d on one leg and squat lower in that leg and make it more challenging on your muscles and i loved push-ups and always loved the pilates plank, a great total body workout and great for the core and abs. martha: ike a big push-up fan. bill: and quick question, you say the core, is that... is that here to stay or some sort of fad when it comes to exercise. >> it got overdone the core training, the abs and the lower back and the middle of the body