The present investigation was designed to evaluate whether dynamic physical exercise is able to modify stapedius reflex (SR) activity and, as a consequence, to influence the amount of temporary threshold shift (TTS). Experimental subjects were 10 normal-hearing male volunteers, aged 27-34 years (mean 30.8). SR parameters in the time-domain were assessed before, during and after submaximal exercise test, performed for 10 min on an ergometer cycle at 50% of maximum work capacity. The same parameters were also investigated in the absence of exercise, at time-matched intervals. In addition, the combined effect of noise and exercise was studied. The outcome of the investigation indicates that dynamic physical exercise depresses the SR and potentiates noise-induced TTS. The mechanisms underlying the present findings are discussed.
Reduced active protection to the cochlea during physical exercise
COLLETTI, Vittorio;VERLATO, Giuseppe;
1991-01-01
Abstract
The present investigation was designed to evaluate whether dynamic physical exercise is able to modify stapedius reflex (SR) activity and, as a consequence, to influence the amount of temporary threshold shift (TTS). Experimental subjects were 10 normal-hearing male volunteers, aged 27-34 years (mean 30.8). SR parameters in the time-domain were assessed before, during and after submaximal exercise test, performed for 10 min on an ergometer cycle at 50% of maximum work capacity. The same parameters were also investigated in the absence of exercise, at time-matched intervals. In addition, the combined effect of noise and exercise was studied. The outcome of the investigation indicates that dynamic physical exercise depresses the SR and potentiates noise-induced TTS. The mechanisms underlying the present findings are discussed.
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