The change in the femoral artery blood flow in the non-exercising leg during single-leg pedaling exercise is unclear. Subjects was 12 healthy young adult males (age: 21.2±0.2, height: 173.4±2.0 cm, Weight: 64.3±2.1 kg). We measured the femoral artery blood flow in the non-exercising leg using ultrasound imaging device during single-leg pedaling exercise by a bicycle ergometer. Exercise intensity was set to 50% of Peak V, as determined by cardiopulmonary exercise testing during the one-leg pedaling exercise. Subjects were performed the single-leg exercise for 10 minutes after rest of 4 minutes and warming up of 4 minutes. Superficial femoral artery blood vessel diameter and velocity were measured in the non-exercising leg, to calculate blood flow volume in the superficial femoral artery. The superficial femoral artery blood flow in the non-exercising leg during an exercise was significantly higher than that at rest and prior to the exercise (1min of rest to 10 min of exercise: 197.8±53.2 to 385.2±108.5mL/min, P<0.01). These results suggest that a superficial femoral artery blood flow increases in the non-exercising leg during a single-leg pedaling exercise in healthy adult males.
