Some obstacle courses seem like they want nothing more than to see you fail. Tough Mudder, on-the-other-hand, wants to prepare you as much as possible. One way they do that is by offering helpful tips on social media.
It's hard to function when we're cold, especially our hands. So, why don't we practice for cold weather challenges just like we practice for other obstacles?
They call them "Falling Stars." We call them reverse pull-ups. Whatever you call them, they are a great way to work towards proper pull-ups.
It's not a question of whether there'll be monkey bars. The questions are when and how many. Be prepared.