Which of the following best describes one repetition maximum (1 RM)?

One repetition maximum (1 RM) is defined as the maximal resistance that an individual can lift in a single attempt for a specific exercise. This measure is important in strength training and rehabilitation because it helps determine the highest level of load a person can handle at one time, thereby aiding in the design of personalized training programs.

Understanding the concept of 1 RM is crucial for establishing baseline strength levels and tracking progress over time. It's often used to prescribe intensity for training regimens, where percentages of the 1 RM are utilized for various training goals, such as hypertrophy (muscle growth) or strength development.

In contrast, other options discuss concepts that do not reflect the definition of 1 RM. Endurance training typically involves lighter weights for multiple repetitions rather than a single maximal lift, the average weight lifted in a week does not correlate directly with 1 RM as it refers to weekly volume rather than peak strength, and lifting a certain weight multiple times consecutively relates to endurance rather than to the maximum weight lifted in one attempt. Thus, option B succinctly captures the essence of what one repetition maximum truly represents.