The AlterG® Anti-Gravity Treadmill™ integrates patented, NASA Differential Air Pressure (DAP) technology, a precise air calib ... ration system, and real-time information to change what’s possible in rehab and training. Using a pressurized air chamber to uniformly reduce gravitational load and body weight in precise 1% increments, AlterG enables patients and athletes to move unrestricted and pain-free – restoring and building muscle strength, range of motion, balance, function, and fitness. No other unweighting technology offers as much freedom, control, and versatility. read more