Does Zone 2 training actually increase VO2 max over time, or is it just a myth perpetuated by coaches and training plans. It seems like every training program includes a large block of Zone 2 work, but when you look at the research, its not entirely clear that this type of training is effective for improving VO2 max. Some studies suggest that Zone 2 training can improve cardiovascular function and increase muscle mitochondria, but others have found no significant improvements in VO2 max after prolonged periods of Zone 2 training.
Is it possible that Zone 2 training is just a way to build endurance and increase the amount of time you can spend on the bike, rather than actually improving your aerobic capacity. Or are there specific protocols or intensities that need to be followed in order for Zone 2 training to be effective for improving VO2 max. Id love to hear from coaches and athletes who have experimented with different types of training and have seen varying results.