These extreme challenges are no stroll in the park, they are tough and mean and you'll have to be in pretty good shape to meet them head-on to complete them.
Getting in shape will require training, a lot of it. The guide includes some tips as to the type of fitness training you will need. Nevertheless, getting, cold, wet and muddy are the least of your problems, you'll hit the wall and will need every ounce of energy and stamina to see you through to the bitter end.
Are you tough enough to rise to the challenges these events have to offer? If you think you are, enrol and give it your best shot, and some. You could find yourself competing against some of the toughest, super fit athletes around the UK.

Infographic by: www.craigmanor.co.uk