An investigation of the effects of heat and water exchange in the recovery period after exercise in children with asthma

The American Review of Respiratory Disease
C M SmithM S McElrea

Abstract

It has been reported that asthma provoked by breathing subfreezing air during exercise is enhanced when air at BTPS is inhaled in the recovery period (1). It was concluded that the rate of airway rewarming is an important event in asthma provoked by exercise. It is also possible, however, that the enhanced response was due to hypo-osmolarity caused by condensation of water from inspired air at BTPS on the cooled mucosa. We examined, in a group of boys with asthma, the response to rapid rewarming of the airways after exercise, with and without the potential for condensation. On two test days, two exercise tests were performed 4 h apart on a cycle ergometer. On Day 1 (n = 17), the inspired air during exercise was -5 degrees C, dry. During recovery, the air was either -5 degrees C, dry or 50 degrees C, 23 mg H2O/L. On Day 2 (n = 11), the inspired air during exercise was -15 degrees C, dry, and during recovery was either -15 degrees C, dry or at BTPS. We did not find enhancement of the response with either condition designed to cause rapid airway rewarming. On Day 1 the mean (+/- 1 SD) percent fall in FEV1 was 23 +/- 22 (-5 degrees C, dry) and 24 +/- 21 (50 degrees C, 23 mg H2O/L) (r = 0.92), and on Day 2 it was 19 +/- 17 (-15 degr...Continue Reading

References

Jun 1, 1994·Biofeedback and Self-regulation·F CeugnietJ Gallego
Aug 1, 1992·Thorax·S L JohnstonS T Holgate
Sep 1, 1992·Thorax·S D Anderson, E Daviskas
Jul 9, 2013·Immunology and Allergy Clinics of North America·S Godfrey, Kenneth D Fitch
Jul 9, 2013·Immunology and Allergy Clinics of North America·Janneke C van LeeuwenBernard J Thio
Jul 9, 2013·Immunology and Allergy Clinics of North America·Pascale Kippelen, S D Anderson
Aug 29, 2006·Lancet·Sally E Wenzel
Jul 1, 1993·Respiratory Medicine·S Godfrey, E Bar-Yishay
Feb 26, 2016·European Clinical Respiratory Journal·S D Anderson
May 12, 1994·The New England Journal of Medicine·E R McFadden, I A Gilbert
Sep 1, 1996·Respirology : Official Journal of the Asian Pacific Society of Respirology·S D Anderson
Sep 1, 1994·European Journal of Clinical Investigation·H K Makker, S T Holgate
Jun 1, 1993·The American Review of Respiratory Disease·G J ArgyrosJ J Jaeger

Citations

May 1, 1986·Chest·M S IpC K Mok
May 1, 1986·The Journal of Allergy and Clinical Immunology·C M Smith, S D Anderson
Dec 1, 1972·Archives of Disease in Childhood·M Silverman, S D Anderson
Jun 1, 1981·Respiration Physiology·M Souhrada, J F Souhrada
Oct 1, 1983·Thorax·K YanA J Woolcock

Related Concepts

Bronchospasm, Exercise-Induced
Effects of Heat
Respiratory Tract Structure
Cold Temperature
Osmolarity Measurement
Etiology
Air
Exercise Stress Test
Hypoalphalipoproteinemias
Asthma

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