Freediving, like all sports, requires training to improve. Most freedivers do not have easy access to freediving sites on a daily basis, but fortunately there are several techniques that freedivers can use to train their bodies and minds from the comfort of home – no water required. This article discusses breath hold training to improve a freediver's tolerance to carbon dioxide and low oxygen, but keep in mind that there are also techniques to improve freediving with muscular, cardiovascular, and mental training.

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Rebreather diving is a heavily equipment-dependent sport. Divers who chose to pursue it should be intimately familiar with their rebreather diving equipment. While every rebreather is a little different, it is possible to learn about the components that are common to most rebreather diving equipment.  Learn about the basic parts of a Closed Circuit Rebreather (CCR) using this diagram from the ISC Megalodon CCR. This article can be used in conjunction with the glossary of rebreather diving terms for those unfamiliar with some of the technical language. If you are unfamiliar with rebreather diving, first take a look at Rebreather Diving Basics: What Are Rebreathers and How Do They Work?