I guess I wasn't clear about my question. I'll try to clarify. Do we have the ability to significantly improve our FTP? Hold that question for a moment. Apparently our FTP is a function of our MAP, Maximum Aerobic performance, as measure by a step test. Trainerroad uses a step test, the Ramp test to calculate, or estimate your FTP. The software uses your best one minute average power, (aka, your MAP) and multiplies by .75. FTP = .75 x MAP. So....your FTP is a function of your MAP. So it seems that in order to raise one's FTP, one needs to raise one's MAP. But....it's my understanding that your MAP is dependent on your VO2max, a one-to-one relationship. Since it's known that VO2max is difficult to increase if one is a trained cyclist, how then does one have the ability to raise one's FTP very much? Is our potential to raise FTP limited to how much we can raise our VO2max, and if not, where's the fault in my logic?