Physical EnduranceAlanineAlanine TransaminaseRunningPhysical Conditioning, AnimalAlanine RacemaseInterleukin-1betaExercisePhysical Education and TrainingMuscle, SkeletalBicyclingAthletesSportsOxygen ConsumptionAthletic Performancebeta 2-MicroglobulinPhysical FitnessAlanine DehydrogenasePhysical ExertionMuscle FatigueCitrate (si)-SynthaseReceptors, Adrenergic, betaIntegrin beta3Exercise TestTrack and FieldMuscle Strength