How does crank length affect the efficiency and biomechanics of a rider during Zone 2 training sessions, and what are the implications for optimal crank length selection in this specific context? Are there any studies or data that have investigated the relationship between crank length, rider efficiency, and endurance performance, particularly in the context of Zone 2 training?
What are the primary factors that should be considered when selecting a crank length for Zone 2 training, such as leg length, pedaling style, and bike fit? Are there any specific crank length ranges that are commonly recommended for Zone 2 training, and are these recommendations based on empirical evidence or general guidelines?
How do factors such as rider position, bike geometry, and gear selection interact with crank length to influence the efficiency and effectiveness of Zone 2 training sessions? Are there any potential drawbacks or limitations to using a specific crank length for Zone 2 training, and how can these be mitigated or addressed?