Reduced blood flow in abdominal viscera measured by Doppler ultrasound during one-legged knee extension - Osada, T; Katsumura, T; Hamaoka, T; Inoue, S; Esaki, K; Sakamoto, A; Murase, N; Kajiyama, J; Shimomitsu, T; Iwane, H (J Appl Physiol, 1999)