Shrink a Size in 14 Days. Intrigued by research spotlighting eccentric training as one of the most effective ways to get firm, we asked fitness expert Chris Freytag to create a superfast shape-up exercise routine using this unique technique. When we put a group of readers on the plan, the results were eye-popping: Testers had an average weight loss of 6 pounds and 10 inches in 14 days, with the most successful volunteers losing up to 12 pounds and more than 22 inches all over. The secret is in the program's slow-motion strength routine. Instead of lifting and lowering for 2 counts each, you'll double the lengthening "eccentric" phase of an exercise (i.e., straightening your arm during a biceps curl) to 4 counts. "Each muscle fiber works harder so you get firmer faster," explains Freytag. Runner's World: Running Shoes, Marathon Training, Racing. Shape Magazine: Diet, Fitness, Recipes, Healthy Eating Expertise. Login. My Yoga Online: Yoga Videos, Yoga Classes, Video Downloads Streaming.