If you were on a desert island and could only take one piece of workout equipment, it should be dumbbells (followed by an adjustable weight bench). I’ve been lifting weights four times a week ...

In this case, you have a few options: You could pick up a few cheap dumbbell sets at varying weights, or you could score a ...

which the cheapest models often can't. Warranties reflect a manufacturer's confidence in its product. And with some of the best adjustable dumbbells priced north of $500, you want to be sure your ...