The resistance assembly includes an annular friction surface defined on the carrier, a sleeve positioned over the friction surface, and a coil spring encircling the sleeve and arranged to be tightened in response to {HEAD ~ pivotal movement} of the pedal arm to squeeze the sleeve against the friction surface and generate {TAIL ~ a friction resistance force} 
The resistance assembly includes an annular friction surface defined on the carrier , a sleeve positioned over the friction surface , and a coil spring encircling the sleeve and arranged to be tightened in response to { HEAD ~ pivotal movement } of the pedal arm to squeeze the sleeve against the friction surface and generate { TAIL ~ a friction resistance force }
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