The coach of our Masters program, Bruce Copeland, is always prepared for Tuesday and Thursday training rides with a challenging workout.
The workout often has a theme; particularly, it is often how either your body or mind will feel as you progress through 1.5 hours of riding.
Here is the Master's group anticipating a set of hill climbs at constant power and varying cadence. This is not how they looked at the midway point, but did have some Beck and other tunes to push them over the top . . . phewff!