<== Site of the Week for 2018-03-30 ==>
Monkii Bars has a product for fitness training. This video shows how to use the Monkii Bars while traveling:
They are running a Kickstarter Campaign that ends on 6/28/2018 for the Pocket Monkii. This is the Kickstarter video
This is a youtube video.
NOTE: I am not sure if it is legal to tie things to trees in National Forests. I was camping and got a ticket because the previous camper had tied a string to a tree. It was not my string, but I still got the ticket.