Polarized training is the simplest effective training plan around. It's so simple you basically don't need a plan. The most complex aspect of training for most motivated cyclists is getting proper recovery. Polarized training solves this problem.
The phrase "Polarized Training" was created by Dr. Stephen Seiler, a Professor in Sport Science at the University of Agder in Norway.
As the name suggests, Polarized Training combines two "polar opposite" types of workouts, a combination of (approximately 80%) easy and (approximately 20%) hard.
In Dr. Seiler’s studies, his research revealed that that three "easy" and one "hard" workout per week produced better results than four Sweet Spot (i.e. moderately hard) workouts.
In Polarized Training, instead of building in recovery weeks into your schedule, you can follow the same structure week after week.