Effects of Caffeine on Muscle Glycogen Utilization and the Neuroendocrine Axis during Exercise1
Laurent D, Schneider K, Prusaczyk W, Franklin C, Vogel S, Krssak M, Petersen K, Goforth H, Shulman G. Effects of Caffeine on Muscle Glycogen Utilization and the Neuroendocrine Axis during Exercise1. The Journal Of Clinical Endocrinology & Metabolism 2000, 85: 2170-2175. PMID: 10852448, DOI: 10.1210/jcem.85.6.6655.Peer-Reviewed Original ResearchConceptsMuscle glycogen contentMuscle glycogen utilizationGlycogen contentCaffeine ingestionNeuroendocrine axisGlycogen utilizationGlycogen-sparing effectFree fatty acid concentrationsBeta-endorphin levelsCaffeine-treated groupExercise-induced glycogen depletionMaximal oxygen consumptionEffects of caffeineHigher muscle glycogen contentPlacebo groupExercise enduranceFatty acid concentrationsPlasma concentrationsNeuroendocrine hormonesCortisol releaseProlonged exerciseGlycogen depletionPlasma lactateNormal valuesThigh musclesPersistent Changes in Myocardial Glucose Metabolism In Vivo During Reperfusion of a Limited-Duration Coronary Occlusion
McNulty P, Jagasia D, Cline G, Ng C, Whiting J, Garg P, Shulman G, Soufer R. Persistent Changes in Myocardial Glucose Metabolism In Vivo During Reperfusion of a Limited-Duration Coronary Occlusion. Circulation 2000, 101: 917-922. PMID: 10694532, DOI: 10.1161/01.cir.101.8.917.Peer-Reviewed Original ResearchConceptsCoronary occlusionGlucose metabolismPostischemic stunningAnterolateral left ventricleHeart glucose metabolismCoronary artery occlusionRegional glucose metabolismMyocardial glucose metabolismRegional myocardial ischemiaRegional mechanical functionRapid reperfusionReversible coronary occlusionArtery occlusionMyocardial ischemiaIntact ratsPreferential shuntingBlood flowReperfusionTracer uptakeLeft ventricleGlycogen depletionMetabolic signaturesOcclusionPersistent changesSustained changesIntramuscular Glycogen and Intramyocellular Lipid Utilization during Prolonged Exercise and Recovery in Man: A 13C and 1H Nuclear Magnetic Resonance Spectroscopy Study1
Krssak M, Petersen K, Bergeron R, Price T, Laurent D, Rothman D, Roden M, Shulman G. Intramuscular Glycogen and Intramyocellular Lipid Utilization during Prolonged Exercise and Recovery in Man: A 13C and 1H Nuclear Magnetic Resonance Spectroscopy Study1. The Journal Of Clinical Endocrinology & Metabolism 2000, 85: 748-754. PMID: 10690886, DOI: 10.1210/jcem.85.2.6354.Peer-Reviewed Original ResearchProlonged exerciseIMCL contentGlycogen contentBaseline valuesSoleus muscleMuscle glycogenMuscle groupsGreater muscle glycogen utilizationForearm musclesGlycogen concentrationLipid utilizationIntramyocellular lipid poolMuscle glycogen utilizationCalf muscle groupThigh muscle groupsIntramyocellular glycogenNonexercising muscleIntramuscular glycogenGlycogen depletionGlycogen utilizationTime of exhaustionLeg musclesThigh musclesSubmaximal intensitiesMuscle