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THE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS
A Journal on Applied Physiology, Biomechanics, Preventive Medicine,
Sports Medicine and Traumatology, Sports Psychology
Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111
Original articles EXERCISE PHYSIOLOGY AND BIOMECHANICS
The Journal of Sports Medicine and Physical Fitness 2004 December;44(4):342-8
Exercise induced arterial hypoxemia in swimmers
Spanoudaki S. S. 1, Maridaki M. D. 2, Myrianthefs P. M. 3, Baltopoulos P. J. 1
1 Division of Sports Medicine and Biology of Exercise Laboratory of Functional Anatomy TEFAA University of Athens, Dafni, Greece
2 Laboratory of Exercise Physiology TEFAA University of Athens, Dafni, Greece
3 School of Nursing Intensive Care Unit, KAT Hospital University of Athens, Athens, Greece
Aim. Exercise induced arterial hypoxemia (EIAH) is a reduction in arterial oxygenation, which may result from a drop in arterial oxygen pressure and therefore in oxygen saturation. We examined EIAH in swimmers, while till now it was known to occur in cyclists and runners.
Methods. We studied 8 male highly trained swimmers (age: 23±1.7; V.O2peak, 5.3±0.1 l/min and 8 male ex-swimmers (age: 21.5±0.6; V.O2peak, 3.4±0.3 l/min). All subjects performed 200-meter freestyle at maximum effort. Hemoglobin saturation (SaO2%) was measured using a finger pulse oximeter before exercise in the water in an upright position and immediately after exercise, within 5 seconds.
Results. Highly trained swimmers developed a statistically significant decrease in SaO2% (from 98.3±0.3 to 94±0.9, p≤0.01) after exercise, while ex-swimmers did not (from 98.4±0.3 to 96.8±0.3 ns). The 4% decrease in SaO2% observed in highly trained swimmers can be characterized as mild EIAH.
Conclusion. Our study suggests that highly trained swimmers but not ex-swimmers may develop mild EIAH after 200 meters freestyle swimming at maximum effort.