What makes a workout something other than just a run? In this training deep dive, Michael & Steve describe the architecture of a workout. The two categories we use are form & function - following the famous quote of Louis Sullivan: "Form ever follow function." 
The full quote is pretty cool, actually:

 Whether it be the sweeping eagle in his flight, or the open apple-blossom, the toiling work-horse, the blithe swan, the branching oak, the winding stream at its base, the drifting clouds, over all the coursing sun, form ever follows function, and this is the law. Where function does not change, form does not change. The granite rocks, the ever-brooding hills, remain for ages; the lightning lives, comes into shape, and dies, in a twinkling.

It is the pervading law of all things organic and inorganic, of all things physical and metaphysical, of all things human and all things superhuman, of all true manifestations of the head, of the heart, of the soul, that the life is recognizable in its expression, that form ever follows function. This is the law.

-Louis Sullivan

In our discussion we break things down as such:

Form

• pace/effort
• distance/duration
• rest/recovery
• warm-up/cool-down

Function

• variation
• specificity
• one discrete whole
• purpose

We go pretty deep here. Enjoy & godspeed, my friends, godspeed.