There's "getting in shape for a role," and then there's "transforming from average mall chick to a slightly smaller version of Arnold." In the first movie, there was nothing special about Sarah Connor—she was a perfectly normal waitress with a perfectly normal body. When T2 rolled around, we got introduced to the new Sarah: A rippling mass of pissed-off mental patient. We imagine Linda probably had to do more than a few sit-ups in between.