Pilates apparatus uses springs that provide resistance. Pilates is not pure weight training, it also offers flexibility. The springs offer what’s called progressive resistance. That means that the further you stretch them, the harder you’re working. Springs provide flowing, effective stretching simultaneous to strengthening. Plus, it’s easier to take springs safely through multiple planes of motion. Try it out – you’ll be surprised at the results you can get, and how quickly you can see results. If you compare the Pilates apparatus to weight machines, you’ll work harder on the apparatus since you have to stabilize your body, just like you would in everyday life. Weight machines do all of the stabilizing for you.