Training is all. There is no way that training can stop. When you are talking about SHTF you aren’t talking about a short mission. You are talking about the long haul. In the early stages your skills will be strong but what happens if 2 years down the line you have done nothing to hone your skills, nothing to keep your strength. What will you look like? You will be a completely different survivor. There is no getting around that.
This is an incredible article that features many ideas about continued training after collapse as well as the resources needed to pull that training off. These are important things to consider. Remember that planning doesn’t end when the disaster strikes it must carry you through to whatever form of recovery occurs.