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Temporary threshold shift induced by physical exercise

C Miani1, G Bertino, M P Francescato

  • 1ENT Clinic, University of Udine, Italy.

Scandinavian Audiology
|January 1, 1996
PubMed
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Physical exercise can cause temporary threshold shifts (TTS) in hearing, particularly at higher frequencies. This study found TTS exclusively linked to physical activity, with mechanisms still requiring further investigation.

Area of Science:

  • Audiology
  • Exercise Physiology
  • Occupational Health

Background:

  • Previous research suggests physical exercise can exacerbate noise-induced temporary threshold shifts (TTS).
  • However, evidence for TTS solely attributable to physical activity has been lacking.
  • Understanding exercise-induced hearing changes is crucial for occupational and general health.

Purpose of the Study:

  • To investigate the presence and characteristics of temporary threshold shifts (TTS) in hearing exclusively due to physical exercise.
  • To determine the relationship between exercise intensity and the occurrence of TTS.
  • To explore potential correlations between physiological parameters and exercise-induced TTS.

Main Methods:

  • Pure-tone hearing thresholds were measured in 10 subjects at rest.

Related Experiment Videos

  • Thresholds were re-evaluated at specific intervals post-exercise.
  • Exercise was conducted at 50% and 80% of maximum oxygen uptake (VO2 max).

    • Main Results:

    • A significant effect of physical exercise on hearing thresholds was observed at 6000 Hz and 8000 Hz.
    • Higher exercise frequencies correlated with a greater likelihood of detecting TTS.
    • No statistically significant correlation was found between TTS and VO2 max, blood lactate, or blood pressure.

    Conclusions:

    • Physical exercise alone can induce temporary threshold shifts (TTS) in hearing, especially at high frequencies.
    • The physiopathologic mechanisms underlying exercise-induced TTS remain unclear.
    • Further research is needed to explore the delayed effects of metabolic changes on cochlear function post-exercise.