When it comes to structuring a Zwift workout plan for building power, both high-intensity interval training (HIIT) and longer, sustained efforts have their merits. A polarized approach, where 80% of your training is at low intensity and 20% is at high intensity, can be effective for improving power and overall fitness. This method allows for adequate recovery while still challenging your body with intense efforts. On the other hand, a more balanced approach that incorporates both HIIT and endurance work can provide variety and address different energy systems.
Scientific evidence supports both methods, but with some nuances. HIIT has been shown to improve cardiovascular and metabolic function, as well as power output (Rodas et al., 2016). Meanwhile, longer, sustained efforts can enhance muscular endurance and promote fat oxidation (Helgerud et al., 2007). Ultimately, the best approach depends on your individual goals, preferences, and available training time.
Zwift's built-in workouts can be helpful in structuring your training. They offer a variety of sessions that cater to different fitness levels and goals. Experiment with different workout types and durations to find what works best for you. Remember, consistency is key in any training plan, so choose an approach that you can stick to in the long term. Feel free to share your experiences and insights, as our collective wisdom can benefit everyone in the community.
References:
Helgerud, J., Hoydal, K., ****, E., Berg, P., Bjerkaas, M., Simonsen, T., ... & Hoff, J. (2007). Aerobic high-intensity intervals improve VO2max more than moderate-intensity continuous training. Medicine and Science in Sports and Exercise, 39(4), 665-671.
Rodas, G., Fernández-Lázaro, D., Calderón-Garcidueñas, L., Fernández-Elliott, A., & Del Coso, J. (2016). Effects of 4 weeks of high-intensity interval training on skeletal muscle oxidative capacity and cardiorespiratory fitness in young adults. Journal of Strength and Conditioning Research, 30(4), 963-971.