We're all a teensy bit guilty of having unrealistic expectations at the gym: a few squats and presto--one size smaller! Nothing works that fast, but with the right strategy you can see results in just two weeks, says Pete McCall, trainer and exercise physiologist with the American Council on Exercise. What makes that possible: focusing on muscles that respond fastest to strength training--those in your arms, shoulders, calves and lower abs.
These moves will help you score, tighter arms, calves and lower abs in two weeks; see sexy definition in your butt, hips and thighs in four (and, if you have weight to lose and are eating right, drop a dress size); and after six weeks, you'll be slimmer and more toned all over. Do two sets three or four days a week circuit-style.