The boot fixing system (1), comprising toe (2) and heel (3) clamps on a ski or snowboard (4), incorporates a detector (5) for the efforts to which the boot is subjected, producing an analog signal (8), and analog/digital signal converter with a processor in a decision module (6) generating a command signal (9). This goes to an actuator module (7) with a pneumatic or mechanical energy source that allows the boot to be released. The system can also incorporate an optional interface module with a potentiometer and an emitter/receiver.
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