The reins can be attached to the central ring, to the lower ring or to bit rings. The Pessoa bit allows for a higher placement in horses that tend to carry weight on their shoulders.
It is possible to modulate the strength of the bit according to the placement of the reins on the rings.
The position on the bottom ring is the strongest action. It is also possible to use rings and attach them to two of the three rings. More experienced riders can also use four reins, which allows more possibilities in terms of adjusting the strength of the bit.
Specific References
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