Is it just squeezing in tight muddy passages?
Although this is what most people think caving is all about, most of the time spent underground (with a few exceptions!) is spent walking. Of course there will be times where you will have smaller sections to negotiate, but on the whole, these narrower bits are usually short. Depending on the cave, there may be streamways, or vertical obstacles to overcome. The Club holds training sessions above ground to teach some of these advanced techniques. Caves and mines vary considerably in difficulty, and there are lots of easy trips for beginners to do.