Originally Posted by rubiksoval

Fitness on the continuum.

Start with the second, move to the first.

A lot of my winter workouts are sweetspot and threshold and start moving towards the higher intensities the closer to the race season (in general).

In real life, though, I like to hit a larger range of intensities than that year round, I just do it in different doses with the most high-intensity occurring during race season and the least at the start of winter.

That's basic periodization to a degree, general -> specific.