Adaptations to the demands of training occur gradually, over long periods of
time. Efforts to accelerate the process may lead to injury, illness, or “overtraining”
(see Part 2, of this chapter Restoration, Recovery, and Overtraining). Many adaptive
changes reverse when training ceases. Conversely, an indadequate training load
will not provide an adequate stimulus, and a compensatory response will not occur.
Figure 3-4 illustrates the effects of various training loads