Which periodization model is characterized by planned variations in training load and volume throughout the training cycle?

The characteristic of planned variations in training load and volume throughout the training cycle aligns well with the concept of undulating periodization. This model involves frequent changes in intensity and volume, allowing for both recovery and adaptations to different stimuli. By incorporating varying training loads on a regular basis, undulating periodization helps to optimize performance and prevent plateaus. For example, it could involve alternating between heavy, moderate, and light training days within a week, which can facilitate continuous improvements and reduce the risk of overtraining.

Linear periodization, on the other hand, typically follows a more structured approach where intensity gradually increases while volume decreases over a longer period, which does not emphasize frequent changes. Cyclic periodization may refer to cycles of different training phases, but it doesn't specify the frequent variation aspect of undulating models. Non-linear periodization is often used interchangeably with undulating periodization but doesn't specifically capture the systematic and regular adjustments seen in the latter. Therefore, undulating periodization best exemplifies a strategy that explicitly includes planned variations in training loads and volumes throughout the training cycle.