Light Resistance. Visible Results in 10 Workouts or Less Resistance + Repetition = Results Busy moms and business travelers, take note: now there s an easy, effective slimming regime you can do just about anywhere. In one low-impact workout, The Firm Resistance Cord delivers full-body fitness, including cardio activity, strength training, and flexibility conditioning. Simply follow along with The Firm® Fat-Burning Cardio Toning DVD and customize your workout with three levels of resistance. Trim Away Unwanted Inches with Easy Fat-Burning Moves. Tone and Strengthen Your Body with Continuous Resistance. Tighten and Firm Using Strategic Low-.