Pilates builds muscle tone, improves balance and alignment, and whittles your waistline. You’ll also ease aches and pains, get better posture, and gain flexibility for a lean, lithe physique. Ten 5-minute exercise blasts allow you to customize the practice to your needs. Start with a few segments and mix and match them as you grow stronger--you’ll be doing the full program in no time. Each mini workout engages the core muscles while toning and stretching the entire body. You’ll get a trim tummy, strong back, and toned arms and legs, all by using your own body weight as resistance. So grab a mat and get started! A certified personal trainer and group fitness instructor, Andrea Metcalf has helped thousands of people stay fit over a career spanning nearly 30 years. She makes frequent appearances on NBC’s Today show and writes about fitness.