Yes, sometimes. While carrying a pack can be challenging, it is by no means an unachievable task. The physical training that is conducted during your initial recruit course is designed to gradually prepare you for carrying your equipment. You will be instructed on how to correctly set-up and wear your pack to minimise the risk of injury, and there are guidelines for personnel regarding lifting and carrying weights.
The requirement to carry packs or loads differs between the services.
As a general rule, a pack is not worn in the work environment. Packs or heavy loads may be incorporated into some aspects of initial recruit training, emergency drills, physical fitness or adventure training.
There is a requirement to carry loads, such as packs, at certain times during your recruit and ongoing unit training. Depending on your career path, and your location of posting, you may be required to carry packs for short periods of time during activities such as training exercises, physical fitness training and on operations.
During stages of your recruit and unit training you will be required to carry a pack.