If you want help squeezing those vital reps of spine stretches and leg circles into your busy travel schedule, all you need is a cell phone and Portable Pilates (www.mobile-mind.com; $4.99). The virtual primer, adapted from expert Alycea Ungaro's book of the same name, includes eight video demos, point-by-point descriptions, and an exercise log to keep track of your goals. The program can be loaded into your phone through a onetime call to most service providers. Up next: Portable Yoga.
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