Yes. There are many people whose family or work commitments prevent them from doing much training for the Camino. And plenty of others who have found a that a major life change (loss of job or a divorce) has compelled them to go now. You can do the Camino without training in advance, with a few caveats. You MUST do at least some trial walks with your footwear and backpack. Trail testing your gear will help you identify hotspots and make sure that your shoes and pack fit properly. You MUST also be patient at the beginning of your Camino. If you can't train, then you have to take it very slowly for the first 4-7 days. This will serve to help your body adjust to the rigors of the trail. You don't want a pile of blisters, muscle pain, shin splints or "whatever" to torpedo your pilgrimage. Take your foot off the gas pedal and give yourself permission to let your body guide you.