No-Equipment Needed Upper Body Pulls

Sometimes gravity is the best form of resistance in your training.

All you need to train is your body. Mastery of that one machine makes the world a playground and almost certainly ensures a life of physical vigor. Bodyweight movement is the best because it is:

 

1. Cheap (you need $0 of equipment)
2. Adaptable (you can do it on a boat, you can do it with a goat)
3. Safe
4. The most natural, functional form of training

 

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source http://breakingmuscle.com/fitness/no-equipment-needed-upper-body-pulls