Alterations in pulmonary function consequent to competitive marathon funning

Maron, Michael B.; Hamilton, Lyle H.; Maksud, Michael G.

doi:10.1249/00005768-197901130-00004

Cited by 44 publications

(49 citation statements)

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“…Because PE max was signiWcantly altered only after EMF-EX, our Wndings conWrm that exercise aVects pulmonary function independently of respiratory muscle fatigue (Coast et al 1999;Haverkamp et al 2001). Furthermore, the transient decrease in FVC following intense exercise similar to previous observations (Coast et al 1998;Maron et al 1979) was likely the cause of the decreased FEV 1 since FEV 1 /FVC was unchanged. However, since these changes were similar during EMF-EX and CON-EX, it is improbable that they are responsible for the reduced performance with EMF.…”

Section: Methodological Aspectssupporting

confidence: 83%

Expiratory muscle fatigue impairs exercise performance

et al. 2007

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High-intensity, exhaustive exercise may lead to inspiratory as well as expiratory muscle fatigue (EMF). Induction of inspiratory muscle fatigue (IMF) before exercise has been shown to impair subsequent exercise performance. The purpose of the present study was to determine whether induction of EMF also aVects subsequent exercise performance. Twelve healthy young men performed Wve 12-min running tests on a 400-m track on separate days: a preliminary trial, two trials after induction of EMF, and two trials without prior muscle fatigue. Tests with and without prior EMF were performed in an alternate order, randomly starting with either type. EMF was deWned as a ¸20% drop in maximal expiratory mouth pressure achieved during expiratory resistive breathing against 50% maximal expiratory mouth pressure. The average distance covered in 12 min was signiWcantly smaller during exercise with prior EMF compared to control exercise (2872 § 256 vs. 2957 § 325 m; P = 0.002). Running speed was consistently lower (0.13 m s ¡1 ) throughout the entire 12 min of exercise with prior EMF. A signiWcant correlation was observed between the level of EMF (decrement in maximal expiratory mouth pressure after resistive breathing) and the reduction in running distance (r 2 = 0.528, P = 0.007). Perceived respiratory exertion was higher during the Wrst 800 m and heart rate was lower throughout the entire test of running with prior EMF compared to control exercise (5.3 § 1.6 vs. 4.5 § 1.7 points, P = 0.002; 173 § 10 vs. 178 § 7 beats min ¡1 , P = 0.005). We conclude that EMF impairs exercise performance as previously reported for IMF.

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Section: Methodological Aspectssupporting

confidence: 83%

Expiratory muscle fatigue impairs exercise performance

et al. 2007

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“…Maron et al (20) found an increase in RV immediately following a marathon. The RV had returned to the pre-exercise value when the subjects were retested 24-hours following the race.…”

Section: Study Vmentioning

confidence: 96%

“…In all other instances, however, permission must be obtained from the author. LIST OF TABLES In recent years, several studies have shown that RV increases during exercise (10,30) and remains elevated immediately upon completion of exercise (6,20,28). Although the effect of exercise on RV is well documented, the physiological mechanisms responsible for the increase are unclear.…”

Section: Statement By Authormentioning

confidence: 99%

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The effect of an acute bout of exercise on selected pulmonary function measurements

Buono

Constable

Morton

et al. 1981

Medicine & Science in Sports & Exercise

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“…Six published articles were identified that measured resting spirometry values in long-distance runners (both marathon and triathlon participants). [16][17][18][19][20][21] These studies described primarily the effect of running on PFT values and provided baseline spirometry values in small groups of highly trained athletes. Table 4 provides the demographic information along with actual and predicted values for FEV 1 and FVC.…”

Section: Discussionmentioning

confidence: 99%