Free workout: Dumbbell Full-Body Functional: Countdown – 42-min abs, back, chest, legs... exercise routine. Click through to do this workout plan for free or download as a printable PDF. Load up in the WorkoutLabs Fit app for the best experience and visit our library for more gym and home workouts and training plans for weight loss, toning, strength and overall fitness. Search for WorkoutLabs at the App Store!