Whats the point of splitting hairs between zone 2 and zone 3 when it comes to improving functional threshold power? I see coaches and training plans advocating for both, but nobody seems to be able to give a straight answer on which one is actually better.
Is zone 3 really better for improving FTP, or is it just a myth perpetuated by coaches who want to make training plans sound more complicated than they need to be? I mean, zone 2 is supposed to be the endurance zone, right? Thats where you build the foundation for all your other training. But then youve got coaches saying that zone 3 is where the magic happens, and thats where youll see the biggest gains in FTP.
But whats the actual science behind this? Is zone 3 really more effective for improving FTP, or is it just a matter of how you structure your training plan? Ive seen some studies that suggest that zone 2 can be just as effective for improving FTP, especially if youre doing longer rides at a lower intensity.
And then theres the whole issue of individual variability. What works for one person may not work for another. Maybe zone 3 is better for people who are already pretty fit, but for beginners, zone 2 is a better place to start.
Id love to hear from some coaches or experienced riders who have actually experimented with both zone 2 and zone 3 training. What are your experiences? Do you see better gains in FTP from zone 2 or zone 3 training? And whats the optimal mix of zone 2 and zone 3 training for improving FTP?