With the Max's revolutionary Quick-Change Resistance™ system, you don't have to deal with any of the hassle. You can quickly move from 5 to 240 lbs. of resistance (upgrades to 340 lbs.). Simply reach back, flip the ends of the bars under the collar and you're done. The Max makes weight training quick and easy. After all, who wants to unscrew pins or deal with bulky plates in between exercises? Not to mention the space all those free weights require. The Max's Quick-Change Resistance™ system not only makes for an ultra-convenient way to exercise, but-get this-it's more effective too. Quick-Change Resistance™ makes circuit training easier than ever. Circuit training is a super-effective workout method that's been used by professional athletes for years. It involves moving rapidly from one exercise to the next, keeping your heart rate elevated for greater fat burning results. Only the Max features the ultra-fast, easy resistance system that makes proper circuit training possible. Quick-Change Resistance™ lets you move from one exercise to the next in seconds. And the Max allows for such a wide variety of exercises, you can create hundreds of different fat burning workouts! Continue to reason number 4: Total-body Workout