We recommend it. We will send you a training guide four months before your departure with excursions designed to get you ready for the Camino.
The best way to prepare is simply to go for long walks. If you know of hilly trails through rugged terrain, similar to those you will encounter along the Camino, all the better. Wear the same footwear and clothing you intend to bring on the Camino. This will help you assess what works and what doesn’t. Since you’ll have to get used to carrying a backpack, you might as well throw that on your back, too.
The main thing is to start your training early and increase your distances gradually. That will help you build your stamina for what lies ahead.
Of course, it’s not unheard-of for some of the more carefree pilgrims to just hit the trail without any training whatsoever. We certainly wouldn’t advise it, especially if you plan to cover a long distance, but we wouldn’t want to stand in the way of one’s adventurous spirit either.