As senior science editor for Muscle & Fitness and Flex magazines, I get to try a variety of training equipment. Out of all the adjustable dumbbells I have tried, the Ironmaster Quick Lock Dumbbell System is the best. In fact, they are so good they are the only dumbbells I have in my home gym. They are the only dumbbells I need. With the Quick-Lock Dumbbell Add-on Kit, I can have an entire rack of dumbbells, from 5-120 pounds, in a matter of seconds. They make it easy to move from one exercise to the next.
Jim Stoppani, PhD, senior science editor, Muscle & Fitness and Flex magazines, author of Encyclopedia of Muscle & Strength (humankinetics.com)
