Keiser’s A250 Lower Back is an entirely different powerful machine from other competitors on the market. It focuses not only on building muscles but also on protecting them. Its low inertia design gives you a smooth resistance. It can help to protect joints and connective tissue from shock loading. It is perfect for people at any fitness level -from older adults to elite athletes. This machine comes with a compact footprint, a large digital display that shows resistance, sets, repetitions, and peak power; Thumb buttons at a suitable position that lets you change resistance without changing position, a chip system, and integrated technology. With this machine, you can enjoy a pain-free range of motion, achieve your goals very faster, train at any speed as you wish, and have Unique versatility