Pulling up on the bar by the system of Charles Lewis Armstrong,
ArmEx is an app for everyone who wants to increase their pull-up ability. When training alone, most people increase their pull-ups but quickly plateau. This training system contains everything you need to increase bust through plateaus: overload, variety and regularity.
Major Charles Lewis Armstrong of the United States Marine Corps developed the famous Armstrong Pull-up Program. He used his program to set a world record in pull-ups. Everyone who trains after 6-8 weeks should get to a 20 pull-ups max set. Train hard, set goals, achieve success!
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Based on http://armstrongpullupprogram.com/