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.
The guide provides an overview of various different challenges around the UK, along with handy tips to help you survive. The 'Brownlee meter' tries to give insight into just how arduous these challenges are even for those who think they are tough enough to get to the finish line.
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