کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2848443 1167422 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of human pregnancy and advancing gestation on respiratory discomfort during exercise
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی فیزیولوژی
پیش نمایش صفحه اول مقاله
Effects of human pregnancy and advancing gestation on respiratory discomfort during exercise
چکیده انگلیسی

This study examined the effects of human pregnancy and advancing gestation on the intensity of respiratory discomfort (dyspnea) during cycle exercise. Fourteen pregnant women (PG) performed a progressive cycle ergometer exercise test involving 20 W/min increases in work rate to symptom limitation and/or a heart rate of 170–175 beats/min at 19.7 ± 1.2 weeks (ENTRY), 28.2 ± 0.3 weeks (TM2) and 36.3 ± 0.3 weeks (TM3) gestation. Eight, age-matched, sedentary non-pregnant women (CG) were also studied for comparison purposes. Measurements included dyspnea intensity (Borg scale), minute ventilation (V˙E), breathing pattern and other cardiorespiratory parameters. At peak exercise, neither pregnancy nor advancing gestation had an effect on dyspnea, V˙E, breathing pattern, oxygen uptake or work rate (p > 0.05). V˙E was significantly greater (by 11 L/min at 100 W) in the PG at TM3 versus CG (p < 0.05) at all submaximal work rates. V˙E also increased progressively from ENTRY to TM2 and TM3 during submaximal exercise. Dyspnea was not significantly different at any submaximal work rate in the PG at TM3 versus CG or with advancing gestation in the PG. In addition, dyspnea at a standardized exercise V˙E of 40 L/min was not different at TM3 versus ENTRY or in the PG at TM3 versus CG. Neither pregnancy nor advancing gestation were associated with increased respiratory discomfort during strenuous non-weight bearing cycle ergometer exercise, despite substantial increases in V˙E and progressive mechanical adaptations of the respiratory system to accommodate the increasing size of the gravid uterus.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Respiratory Physiology & Neurobiology - Volume 156, Issue 1, 16 April 2007, Pages 85–93
نویسندگان
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