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Want to take your conditioning workouts up a notch? Throw in a bit of thick rope work. Love it.

The equipment is pretty simple. I personally use ropes from Art of Strength (which I highly recommend); and below I've listed a number of alternative suppliers from around the world. A good rope is never too far away.
In terms of rope types/sizes/lengths, I won't attempt to detail all possible combinations here. All of the suppliers listed below have been selling ropes for some time, and are well placed to discuss the options with you. As long as you have room to hang/swing/drag it, you'll be fine.
Rope isn't exactly light, and shipping can really add up when large distances are involved. Accordingly, we work with suppliers all over the world.
Choose the one nearest you, and save yourself a dollar or three.
Additionally, there are several suppliers mentioned in the comments here. If you come across another one you're happy with, add their name.
NB : If you're a rope supplier and would like to see your name on this list, let us know.
There are many, many ways to train with a length of rope. Here are a few of my favourites :
There are also a number of superb rope exercises on the MBG DVD. Highly recommended.
I love thick rope work - one of the most enjoyable ways to train. Give it a shot.