0000000000713802

AUTHOR

Kjell Någren

0000-0001-5182-8199

showing 2 related works from this author

Myocardial blood flow and adenosine A2Areceptor density in endurance athletes and untrained men

2008

Previous human studies have shown divergent results concerning the effects of exercise training on myocardial blood flow (MBF) at rest or during adenosine-induced hyperaemia in humans. We studied whether these responses are related to alterations in adenosine A2A receptor (A2AR) density in the left-ventricular (LV) myocardium, size and work output of the athlete's heart, or to fitness level. MBF at baseline and during intravenous adenosine infusion, and A2AR density at baseline were measured using positron emission tomography, and by a novel A2AR tracer in 10 healthy male endurance athletes (ET) and 10 healthy untrained (UT) men. Structural LV parameters were measured with echocardiography.…

medicine.medical_specialtybiologyHuman studiesPhysiologyAthletesbusiness.industryAdenosine A2A receptorBlood flowbiology.organism_classificationAdenosineHyperaemiaEndocrinologyInternal medicinemedicinemedicine.symptombusinessPerfusioncirculatory and respiratory physiologymedicine.drugThe Journal of Physiology
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Myocardial and peripheral vascular functional adaptation to exercise training.

2007

Exercise training seems to restore impaired vascular function in both peripheral and myocardial vessels in patients with coronary artery and peripheral vascular disease or in patients with risk factors for these diseases. However, the results on the effects of exercise training on vascular function in apparently healthy subjects are controversial. We studied the effects of long-term volitionally increased physical activity on peripheral and myocardial vascular function in nine young healthy male monozygotic twin pairs discordant for physical activity and fitness. The brothers were divided into more (MAG) and less active groups according to physical activity and fitness. The difference betwe…

AdultMalemedicine.medical_specialty030310 physiologyMonozygotic twinPhysical Therapy Sports Therapy and RehabilitationVasodilationCoronary Disease030204 cardiovascular system & hematology03 medical and health sciences0302 clinical medicineOxygen ConsumptionInternal medicineSurveys and QuestionnairesMedicineHumansOrthopedics and Sports MedicineFinlandUltrasonographyPeripheral Vascular Diseases0303 health sciencesAnalysis of Variancebusiness.industryVascular diseaseBlood flowTwins Monozygoticmedicine.diseaseAdaptation PhysiologicalSurgeryPeripheralExercise TherapyCoronary arteriesmedicine.anatomical_structureTreatment OutcomeCardiologyVascular ResistancebusinessPerfusionArteryTomography Emission-ComputedScandinavian journal of medicinescience in sports
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