Winpex Dumbbell perfect for isolations, full body, functional training, strength training and HIIT workouts.1. VERSATILE Dumbbells offer the ability to target specific muscle groups or attain a full body workout; Build body mass, burn calories faster, increase endurance and strength, and benefit from a healthier body by using a dumbbell in your fitness routine. 2. FUNCTIONAL Perfect for isolations, full body, functional training, strength training and HIIT workouts.