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The protective effects of continuous and interval exercise in athletes with exercise-induced asthma.
The protective effects of continuous and interval exercise in athletes with exercise-induced asthma.
- Source :
-
Medicine and science in sports and exercise [Med Sci Sports Exerc] 1994 Aug; Vol. 26 (8), pp. 951-6. - Publication Year :
- 1994
-
Abstract
- To determine the effect of two forms of warm-up on postexercise bronchoconstriction in athletes with exercise-induced asthma, 12 moderately trained persons with asthma (age = 26.5 +/- 2.2 yr; height = 169.2 +/- 2.6 cm; weight = 64.3 +/- 2.6kg; VO2max = 52.7 +/- 1.3 ml.kg-1.min-1) were tested under three experimental conditions; continuous warm-up (CW), interval warm-up (IW), and control (C). CW consisted of 15 min of treadmill running at a velocity corresponding to 60% VO2max followed by an exercise challenge test (ET = 6 min at 90% VO2max). IW involved 8 x 30-s runs (1.5 min rest between bouts of exercise), at an intensity equivalent to 100% VO2max, followed by an ET. C consisted of only the ET. FEV1, FVC, and MMEFR were measured prior to the experimental conditions, repeated before the ET, and every 2 min during a 25-min passive recovery period, using a Breon spirometer. Postexercise changes in pulmonary function were recorded as the largest decrese in FEV1, FVC, and MMEFR during the recovery period, and expressed as a percentage of baseline values. Significant differences were detected in %FEV1 (34. 6,16.7,29.7: P = 0.009), %FVC (30.0,10.7,21.0: P = 0.03), and %MMEFR (50.0,30.2,43.4: P = 0.05), in comparing C, CW, and IW, respectively. Scheffe's test detected significance (P < 0.05) between C and CW for all three dependent variables; no statistical significance between C and IW or IW and CW occurred. These data indicate that a continuous warm-up of 15 min at 60% VO2max can significantly decrease postexercise bronchoconstriction in moderately trained athletes.
- Subjects :
- Adult
Albuterol therapeutic use
Bronchial Provocation Tests
Bronchoconstriction physiology
Cromolyn Sodium therapeutic use
Female
Forced Expiratory Volume physiology
Heart Rate physiology
Humans
Male
Maximal Midexpiratory Flow Rate physiology
Oxygen Consumption physiology
Pulmonary Gas Exchange physiology
Respiratory Transport physiology
Running physiology
Vital Capacity physiology
Asthma, Exercise-Induced physiopathology
Exercise physiology
Sports physiology
Subjects
Details
- Language :
- English
- ISSN :
- 0195-9131
- Volume :
- 26
- Issue :
- 8
- Database :
- MEDLINE
- Journal :
- Medicine and science in sports and exercise
- Publication Type :
- Academic Journal
- Accession number :
- 7968428