1. A neural modulation system comprising: a blocking stimulus source adapted to produce a blocking stimulus configured to reversibly block conduction in at least a portion of a peripheral neural structure of a subject; a first signal input structure adapted to receive a user input signal indicative of an instruction from a user regarding operation of the neural modulation system to deliver the blocking stimulus, the user input signal transmitted from a user input device adapted to receive a user input from the user of the neural modulation system; a second signal input structure adapted to receive an activity signal indicative of an activity state of at least a portion of a body of the subject innervated by the peripheral neural structure from a sensor operatively connected to the signal input structure; and signal processing circuitry adapted to receive the user input signal from the first signal input structure; modify operation of the neural modulation system responsive to receipt of the user input signal; distinguish a first activity state of the at least a portion of the body of the subject innervated by the peripheral neural structure from a second activity state of the at least a portion of the body of the subject innervated by the peripheral neural structure from the activity signal received at the second signal input structure; and generate a blocking stimulus control signal for driving production of the blocking stimulus by the stimulus source, the blocking stimulus configured to reversibly block conduction in the peripheral neural structure of the subject during at least a portion of the first activity state.