Does training in zone 4 make zone 2 efforts feel easier, or is this a misconception perpetuated by the cycling community? While many coaches and cyclists swear by the benefits of high-intensity interval training (HIIT) in zone 4 for improving endurance and increasing lactate threshold, others argue that this approach can lead to burnout and neglect of the aerobic base.
Is it possible that the perceived ease of zone 2 efforts after training in zone 4 is merely a result of increased muscle buffering capacity and improved neuromuscular coordination, rather than any actual increase in cardiovascular efficiency? Or are there other factors at play, such as changes in perceived exertion and mental toughness, that contribute to the sensation of easier zone 2 efforts?
Furthermore, do the benefits of zone 4 training on zone 2 efforts vary depending on individual factors, such as training experience, genetics, and specific goals? For example, might a beginner cyclist experience greater benefits from zone 4 training than an experienced rider, or vice versa?
Additionally, what role does periodization play in this equation? Is it more effective to alternate between periods of high-intensity training in zone 4 and low-intensity training in zone 2, or to focus on a single zone for an extended period before switching to another?
Lastly, are there any differences in the effects of zone 4 training on zone 2 efforts between different types of cycling, such as road, mountain, or track? For instance, might the technical demands of mountain biking require a different approach to training than the high-speed, low-resistance environment of track cycling?