کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5594231 | 1571295 | 2017 | 31 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of heavy-intensity 'priming' exercise on oxygen uptake and muscle deoxygenation kinetics during moderate-intensity step-transitions initiated from an elevated work rate
ترجمه فارسی عنوان
تأثیر تمرینات پرشدن شدت سنگین بر میزان جذب اکسیژن و سینتیک انکسینژنتیسیون عضلانی در طی مرحله ای از انتقال سریع تر از حد متوسط
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موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
فیزیولوژی
چکیده انگلیسی
We examined the effect of heavy-intensity 'priming' exercise on the rate of adjustment of pulmonary O2 uptake (ÏVËO2p) initiated from elevated intensities. Fourteen men (separated into two groups: ÏVËO2p â¤Â 25s [Fast] or ÏVËO2p > 25s [Slow]) completed step-transitions from 20 W to 45% lactate threshold (LT; lower-step, LS) and 45% to 90%LT (upper-step, US) performed (i) without; and (ii) with US preceded by heavy-intensity exercise (HUS). Breath-by-breath VËO2p and near-infrared spectroscopy-derived muscle deoxygenation ([HHb + Mb]) were measured. Compared to LS, ÏVËO2p was greater (p < 0.05) in US in both Fast (LS, 19 ± 4s; US, 30 ± 4s) and Slow (LS, 25 ± 5s; US, 40 ± 11s) with ÏVËO2p in US being lower (p < 0.05) in Fast. In HUS, ÏVËO2p in Slow was reduced (28 ± 8s, p < 0.05) and was not different (p > 0.05) from LS or Fast group US. In Slow, Ï[HHb + Mb] increased (p < 0.05) in US relative to HUS; this finding coupled with a reduced ÏVËO2p indicates a priming-induced improvement in matching of muscle O2 delivery-to-O2 utilization during transitions from elevated intensities in those with Slow but not Fast VËO2p kinetics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Respiratory Physiology & Neurobiology - Volume 235, January 2017, Pages 62-70
Journal: Respiratory Physiology & Neurobiology - Volume 235, January 2017, Pages 62-70
نویسندگان
Joshua P. Nederveen, Daniel A. Keir, Lorenzo K. Love, Harry B. Rossiter, John M. Kowalchuk,