Great programming requires both science and art. It's a balance of understanding movement, intensity, and the mental side with creatively and elegantly designing workouts that deliver real results and allow for engagement and consistency.
And I love it.
Spent over an hour today talking about variance. Why it's critical to well rounded - "ready for anything" - fitness, and how you can start to look at your workouts through that lens. True variance cannot be "random", but must be carefully crafted to fill in gaps, expand the margins of our experience, and (as best as possible) prevent bias in any one area.
Load, reps, time, equipment, scheme, movements and movement combinations - all like ingredients for a recipe. It all boils down to - what are you trying to make?