کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2703271 | 1144586 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Cardiac responses to swim bench exercise in age-group swimmers and non-athletic children
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کلمات کلیدی
موضوعات مرتبط
علوم پزشکی و سلامت
پزشکی و دندانپزشکی
ارتوپدی، پزشکی ورزشی و توانبخشی
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چکیده انگلیسی
The effect of body posture (e.g., gravity) on circulatory responses to exercise remains to be clarified. This study was designed to examine cardiovascular dynamics during prone swim bench exercise in age-group swimmers and to compare these responses to those of matched non-athletic children. Fourteen trained swimmers (mean age 11.3 ± 0.5 years) performed progressive exercise to exhaustion during simulated butterfly stroke exercise on a swim bench. Stroke volume was assessed by the Doppler ultrasound technique. Standard echocardiographic measures of left ventricular dimensions and function were recorded at rest prior to exercise. Swimmers were compared to a group of 11 non-athletic children matched for age, gender, and anthropometric measures. Compared to the nonathletes, the swimmers demonstrated larger resting left ventricular diastolic dimension and mass (adjusted for body size) but no differences in systolic or diastolic function. Mean peak VO2 was 23.2 ± 4.1 ml kgâ1 minâ1 and 17.8 ± 4.4 ml kgâ1 minâ1 in the swimmers and nonathletes, respectively (p < 0.05). No significant changes were seen in stroke index with increasing work in either group, with values consistently greater in the swimmers (peak 37 ± 6 ml mâ2 versus 31 ± 5 ml mâ2 in the untrained subjects). Failure of stroke volume to rise during a progressive simulated swim test is consistent with a model of peripheral facilitation of circulatory responses to exercise.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Science and Medicine in Sport - Volume 12, Issue 2, March 2009, Pages 266-272
Journal: Journal of Science and Medicine in Sport - Volume 12, Issue 2, March 2009, Pages 266-272
نویسندگان
Thomas Rowland, Valérie Bougault, Guillaume Walther, Stéphane Nottin, Agnes Vinett, Philippe Obert,