Postexercise glucose uptake was significantly higher in the left ventricular myocardium (14.1 μmol/100 g/min) than in the right ventricle (7.2) or quadriceps muscle (6.4).
Does glucose uptake differ between the left and right ventricular myocardium and skeletal muscle after vigorous exercise in healthy males?
The left ventricular myocardium consumes significantly more glucose per unit mass than the right ventricle or skeletal muscle after vigorous exercise.
Absolute Event Rate: 0% vs 0%
Purpose : This study aimed to measure and compare postexercise glucose uptake (GU) in the left and right ventricular myocardium (LV and RV, respectively) and quadriceps femoris (QF) muscle. Methods : Six recreationally active males (22 2 y; VO 2 peak 54 6 mL/kg/min; maximal power 350 22 W) completed a 30-minute cycling bout. The protocol comprised 10 minutes at 100 W, a ramp to exhaustion (+25 W/min), 1 min passive recovery, then cycling at 75% VO 2 peak to 30 minute GU was quantified with 2- 18 FFDG PET. Results : Postexercise GU in the LV myocardium (14.1 5.1 μmol/100 g/min) was significantly higher ( P .27). Circulating venous blood lactate concentration was 1.1 (0.5) mmol/L at rest and peaked at 10.4 (2.6) mmol/L postexercise. Peak lactate tended to correlate positively with GU, particularly in the RV ( r = .93, P = .02) and LV ( r = .87, P = .055) myocardium, and to a lesser extent in the QF muscle ( r = .78, P = .12). Conclusion : These findings indicate that the LV myocardium consumes more glucose per unit mass than skeletal muscle after vigorous exercise, whereas the RV shows no such difference.
Heinonen et al. (Thu,) reported a other. Postexercise glucose uptake was significantly higher in the left ventricular myocardium (14.1 μmol/100 g/min) than in the right ventricle (7.2) or quadriceps muscle (6.4).