It is true that you can get a tough workout with dumbbells and kettlebells. But they are not easy to carry around. Resistance bands can also give you a good workout. The Bodygym Portable Home Gym is a resistance-based fitness system that lets you try various moves anywhere. You get a bar and a natural latex resistance band to get started. To make the bands tighter, just roll the bar towards you.
The Bodygym Portable Home Gym is useful for folks who want to exercise everywhere they go. It ships with a DVD to help you get started faster.