What are the underlying physiological mechanisms that justify the continued emphasis on Zone 2 training for professional riders, despite the fact that most racing occurs at higher intensities, and how do coaches and trainers typically structure these lower-intensity sessions to maximize their effectiveness in supporting a riders overall fitness and competitive goals?
Given the established importance of high-intensity interval training (HIIT) and other forms of intense, anaerobic exercise in developing the physiological capabilities required for success in high-level cycling competitions, it is somewhat counterintuitive that professional riders would devote such a large proportion of their training time to Zone 2 work.
Zone 2 training, which typically involves sustained efforts at moderate intensities (i.e., 60-70% of VO2max), is often characterized as base building or endurance work, and is commonly associated with increases in mitochondrial density, capillarization, and myoglobin levels, as well as enhancements in fat metabolism and lactate clearance.
However, the fact that most racing occurs at intensities above Zone 2, and that many professional riders have already established a solid aerobic foundation through years of training and competition, raises questions about the continued relevance and efficacy of Zone 2 training for this population.
How do coaches and trainers design and implement Zone 2 training programs that are tailored to the specific needs and goals of professional riders, and what types of performance gains or benefits can be expected from this type of training?
Do professional riders use Zone 2 training as a means of active recovery or injury rehabilitation, and if so, how does this type of training help to promote these outcomes?
To what extent do advances in sports science and technology, such as power meters and GPS-enabled training devices, influence the way that Zone 2 training is structured and implemented for professional riders, and are there any emerging trends or best practices in this area?