What is a set in terms of exercise?

A set, in the context of exercise, specifically refers to the number of times a series of repetitions, or reps, for a particular exercise are completed without rest. For example, if someone is performing the exercise of bench pressing and does 10 repetitions in a row, that constitutes one set of 10 reps.

Understanding this concept is crucial for training effectively, as different training protocols involve varying numbers of sets and repetitions to achieve specific fitness goals, such as strength, endurance, or hypertrophy. The other provided options relate to various aspects of a workout but do not define what a set is. For instance, the total duration of a workout pertains to the overall time spent exercising, rest periods concern the recovery intervals between sets or exercises, and the type of exercise addresses the specific movement or activity being performed. Each plays a role in fitness but does not accurately describe the definition of a set.