Which of the following activities should ideally have a progressive structure in the context of training?

A resistance training program should ideally have a progressive structure because this type of training is fundamentally built on the principle of gradual overload. This means that to make gains in strength and muscle size, a coach should systematically increase the weight, repetitions, or sets over time. A progressive structure allows the body to adapt to increased demands, promoting muscle hypertrophy and strength development while minimizing the risk of injury.

In contrast, while endurance running does require a degree of progression, it typically involves longer periods of training adaptations rather than the more specific incremental loads targeted in resistance training. Plyometric routines and activities like yoga focus on different aspects such as explosive power and flexibility, respectively, where the progression may not be as linear or quantifiable as in resistance training. Both plyometric exercises and yoga can benefit from progression, but their structure is often based on skill acquisition or flexibility improvement rather than just increasing load or volume in a straightforward manner.