So what does it look like when you string together a bunch of perfect workouts over a period of time? The answer is line B below:

The dotted line represents fitness gains over time, with each block indicative of an individual workout. 

Line A shows undertraining, with too much time elapsing between exercise, in this case fitness gains are lost prior to the next workout.

Line C shows overtraining, where too many, and too difficult, workouts are chained together to break down the animal physically. 

Line B is what we all strive for, note the relative size of the workouts changes as fitness increases, this illustrates the concept of PROGRESSIVE OVERLOAD, which we will tackle next post.