Power-based training is without a doubt the best way to structure training for cycling, and FTP serves as a way to scale every workout to your current fitness level. But what is a good FTP, and how can you be sure that your FTP is accurate?
Over-under intervals improve your ability to shuttle and buffer lactate near the boundaries of your threshold power. Improving these capabilities will increase your anaerobic capabilities allowing you to output higher power values with greater efficiency and less mental fatigue.
No matter what your goals are—you should be doing threshold intervals. Spending time close to your functional threshold power (FTP) offers extraordinary benefits to your aerobic capacity, muscular endurance, mental stamina, and sustained power capabilities. Not to mention, doing threshold intervals will help to increase your FTP!