What are the key factors that determine a cyclists ability to sustain a high wattage output over a prolonged period, and how do these factors interact with each other to impact overall performance? Is it purely a matter of cardiovascular endurance, or do other physiological and biomechanical factors, such as muscle fiber type and pedaling efficiency, play a significant role in determining a riders ability to produce power over time? Can a rider with a lower peak wattage output still outperform a rider with a higher peak output if they are able to sustain their power output over a longer period, and if so, what are the implications of this for training and racing strategies?