A sprinter includes speed work in their training - AQA - GCSE Physical Education - Question 4 - 2021 - Paper 1

In the context of training for sprinting, the principle that applies is C: Specificity.

Specificity refers to the concept that training should be relevant and appropriate to the sport for which the individual is preparing. Since speed work is directly related to the demands of sprinting, it exemplifies the specific training necessary to improve sprint performance.

• Progressive Overload (A) would mean gradually increasing the intensity or volume of training, but this is not the principle being highlighted in the question.
• Reversibility (B) suggests that gains in fitness are lost when training ceases, and while this is important, it does not apply specifically to the training practices mentioned.

Thus, the most suitable response in relation to including speed work is C: Specificity.