Leg muscles are actually pretty easy to tone up quickly. So we asked certified fitness instructor Amanda Vogel to round up three routines to firm your thighs, calves and butt. Do one or two of the routines, two or three sets of each exercise. Work out three to four times per week, ensuring at least a day’s rest in between. Since we’ve included exercises for both outside and in, the workout is flexible enough that you can tone up your legs even while on vacation. No excuses!