Maximal inspiratory pressure following maximal exercise in trained and untrained subjects

Richard J Coast, P. S. Clifford, T. W. Henrich, J. Stray-Gundersen, R. L. Johnson

Research output: Contribution to journalArticle

57 Scopus citations

Abstract

Previous investigators have demonstrated that 5-10 min of fatiguing exercise would lead to respiratory muscle fatigue in normal subjects. The purpose of this study was to determine if there was a differential inspiratory pressure response to maximal cycle ergometer exercise in trained and untrained subjects. Six highly trained cross country skiers and five untrained college students were studied prior to and 10, 60, and 120 s postexercise (incremental V̇O(2max) to exhaustion). On each occasion, maximal inspiratory pressure (MIP) was measured at the mouth from residual volume. Prior to exercise, the two groups had similar MIP values. After exercise, the sedentary subjects experienced significant decreases in MIP compared to the preexercise values. These decreases averaged 10%, 17%, and 13% at 10, 60, and 120 s postexercise, respectively. The skiers, on the other hand, showed no evidence of a decrease in MIP postexercise, with the postexercise values being slightly, but not significantly, higher than the preexercise values. From these results, we conclude that maximal exercise results in inspiratory muscle dysfunction in normal subjects but not in athletes training at or near elite levels. Thus, it appears that endurance exercise training induces an adaptive change in the inspiratory muscles that protects them from the acute loss of strength seen following exercise in normal subjects.

Original languageEnglish (US)
Pages (from-to)811-815
Number of pages5
JournalMedicine and Science in Sports and Exercise
Volume22
Issue number6
StatePublished - 1990
Externally publishedYes

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Keywords

  • EXERCISE
  • FATIGUE
  • RESPIRATORY MUSCLES
  • TRAINING

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Public Health, Environmental and Occupational Health
  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

Coast, R. J., Clifford, P. S., Henrich, T. W., Stray-Gundersen, J., & Johnson, R. L. (1990). Maximal inspiratory pressure following maximal exercise in trained and untrained subjects. Medicine and Science in Sports and Exercise, 22(6), 811-815.