The military Special Forces and even some of the specialized law enforcement agents have to go through rigorous training and a lot of that training is very physical. This means that the physical training programs that they have to endure and pass are more intense than many athletes even have to go through. The reasons why they have to go through these strenuous training programs is because they often do not know what they will be called on to do, until they are actually told to do it. They could be asked to do something that includes climbing ropes or even walls, they could be asked to swim rivers or jump across brooks or even perhaps to crawl through or lift rubble, perhaps a combination of some or all of these things. That means that unlike a sportsman or athlete that know what they are training for, these men in uniform do not. Neither do they know for how long these rough and difficult activities will last for. No physical training program can therefore be too hard or difficult for these potential heroes and they learn to keep pushing the limit of time they can keep up these extreme exercises. Today, some other people, namely those people that like to work out, are starting to adopt some if not all these training programs in order to stay fit. Although many people had previously done workouts, few were anywhere near as strenuous workouts as those that the potential heroes would undergo. Even the workout enthusiasts though, want to push their own barriers, their own pain barriers to become as fit as possible. The numbers of workout enthusiasts and general stay fit gym users that wanted to try and push their own pain limits and try these once military only exercise regimes, grew rapidly, so rapidly in fact that it has become a sport. As with any other sport, this sport is very competitive which urges the keep fit fanatics to push their limits even further, ignoring their pain barriers over and over again, embracing the pain as if it was part of the equipment needed to play the sport. Although these new sportsmen and women may try as hard as those potential heroes in uniform, to excel at what they do, they should always remember that they have an advantage over the first people to do these exercise regimes and that advantage is in the form of their footwear. The best shoes for crossfit, as this sport has become known as, are trainers especially designed for the rough and diverse type of training involved. Known as crossfit trainers, these trainers can help an athlete avoid foot injuries whilst training but of course, in the early days when crossfit was being used only by law enforcement and military, none of these specialized footwear existed. These specialized trainers are now made by Reebok, Nike and several other footwear manufacturers and their tough design and durability is something that any crossfit athlete should not train without buying first.