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)