Alternative therapies for climbing

I'm always keeping an eye out for ideas from other countries/climbers so intrigued to see the finger rehabilitation setup in the video below  at 2:50. Anyone know anything about it?

 

Additionally, from the same series of videos at the 1:00 minute mark. I've come across one or two other very well known climbers who swear by these devices. Gimmick?

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Getting over the Fear of Falling

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Tierra Boulder Battle 2014