The One Arm Hangs protocol was made popular by Chris Webb-Parsons, an Australian V15 boulderer. The One Arm Hangs can be particularly useful to climbers who are so strong that they need to add very high loads, even over 50 kg, to make their two-handed hangs challenging enough, and for whom reducing the hold size may at some point become painful. Since the One Arm Hangs protocol is very different from any two-handed hangboard protocol, if you never tried it before, you are likely to notice quick strength gains, owing to the entirely new stimuli it provides. This can make One Arm Hangs the perfect tool whenever you need to break through a plateau.