You will not be able to fly in to the remote site as there are no landing strips for airplanes. Everything you need will have to be carried on your back. You think about carrying heavy loads uphill for long distances and realize you need to design a workout program to get your body ready. The workout will need to improve your strength, endurance, and lung capacity in order to allow you to carry heavy loads for long distances every day. With that in mind, you start a workout program with physical activities you enjoy that will prepare you for your expedition.
All machines are essentially alike.
They need a source of energy, they occasionally need to be repaired, and they need to be used regularly to make sure they work well. The human body is just like a machine. It uses food, vitamins and minerals as a source of energy. It needs to be repaired occasionally, which can be as simple as a cut finger that heals on its own, to a broken bone that needs a doctor's help. Most importantly, the human body needs to be used regularly to make sure it works well.