essentrics workout: arms, abs & waist toner / legs, butt & thigh thinner classical stretch - the esmonde technique the powerful eccentric technique of strengthening the muscles in a lengthened position quickly transforms the body into a long, lean and toned shape. people who follow the essentrics toning program notice quick and dramatic changes to their legs, thighs, arms, waist, abs, and even in the fat on their backs.