What kind of physical tests must candidates pass as part of the AIB?

Candidates must pass fitness tests that include a variety of endurance and strength tasks as part of the AIB. This is essential as the role of a Royal Marine requires a high level of physical fitness and the ability to perform under physically demanding conditions. These tests typically evaluate overall physical capabilities, ensuring that candidates can handle the various challenges they will face during their training and operational duties.

In contrast, theoretical knowledge tests do not assess a candidate's physical abilities, making that choice inadequate for evaluating preparation for the rigorous nature of the Marine role. While swimming assessments and endurance running are important components of physical training, focusing solely on either of these would not provide a comprehensive measure of a candidate's overall fitness. Thus, the combination of endurance and strength tasks in the fitness tests gives the best indication of readiness for the challenges posed by the training regimen and operational environment of the Royal Marines.