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Titolo:
Reduced blood flow in abdominal viscera measured by Doppler ultrasound during one-legged knee extension
Autore:
Osada, T; Katsumura, T; Hamaoka, T; Inoue, S; Esaki, K; Sakamoto, A; Murase, N; Kajiyama, J; Shimomitsu, T; Iwane, H;
Indirizzi:
Tokyoapan Univ, Dept Prevent Med & Publ Hlth, Shinjuku Ku, Tokyo 1608402, J Tokyo Med Univ Tokyo Japan 1608402 l Hlth, Shinjuku Ku, Tokyo 1608402, J Tokyo Metropolitan Hlth Promot Ctr, Tokyo 1600021, Japan Tokyo Metropolitan Hlth Promot Ctr Tokyo Japan 1600021 yo 1600021, Japan
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 2, volume: 86, anno: 1999,
pagine: 709 - 719
SICI:
8750-7587(199902)86:2<709:RBFIAV>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
RHYTHMIC EXERCISE; VASCULAR BED; TIME-COURSE; HUMANS; VESSELS; MUSCLE; REDISTRIBUTION; CIRCULATION; RESPONSES; DISEASE;
Keywords:
abdominal visceral blood flow; dynamic knee extension-flexion exercise; pulmonary oxygen consumption; Doppler ultrasound;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
67
Recensione:
Indirizzi per estratti:
Indirizzo: Osada, T TokyoTokyoUniv, Dept Prevent Med & Publ Hlth, Shinjuku Ku, 6-1-1 Shinjuku, Tokyo Med Univ 6-1-1 Shinjuku Tokyo Japan 1608402 -1-1 Shinjuku,
Citazione:
T. Osada et al., "Reduced blood flow in abdominal viscera measured by Doppler ultrasound during one-legged knee extension", J APP PHYSL, 86(2), 1999, pp. 709-719

Abstract

The redistribution of blood flow (BF) in the abdominal viscera during right-legged knee extension-flexion exercise at very low intensity [peak heart rate (HR), 76 beats/min] was examined by using Doppler ultrasound. While sitting, subjects performed a right-legged knee extension-flexion exercise every 6 s for 20 min. BF was measured in the upper abdominal aorta (Ao), right common femoral artery (RCFA), and left common femoral artery (LCFA). Visceral BF (BFVis) was determined by the equation [BFAo - (BFRCFA + BFLCFA)] Acomparison with the change in BF (Delta BF) preexercise showed a greater increase in Delta BFRCFA than in Delta BFAo during exercise. This resulted in a reduction of BFVis to 56% of its preexercise value or a decrease in flow by 1,147 +/- 293 (+/-SE) ml/min at the peak workload. Oxygen consumption correlated positively with Delta BFAo, Delta BFRCFA, and Delta BFLCFA but inversely with Delta BFVis during exercise and recovery. Furthermore, BFVis (% of preexercise value) correlated inversely with both an increase in HR (r = -0.89), and percent peak oxygen consumption (r = -0.99). This study demonstrated that, even during very-low-intensity exercise (HR <90 beats/min),there was a significant shift in BF from the viscera to the exercising muscles.

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Documento generato il 15/07/20 alle ore 14:09:01