Satellite Cells, Skeletal MusclePAX7 Transcription FactorMuscle, SkeletalMuscle DevelopmentRegenerationMuscle Fibers, SkeletalMyoD ProteinMusclesCell DifferentiationCells, CulturedCell LineageMyoblastsSatellite Cells, PerineuronalMuscle ProteinsMyogenic Regulatory Factor 5Muscle ContractionDNA, SatelliteMyogeninMice, Inbred mdxMuscle Fibers, Fast-TwitchMitochondria, MuscleMuscle Fibers, Slow-TwitchMyoblasts, SkeletalMuscle, SmoothCell ProliferationDesminPaired Box Transcription FactorsMuscular AtrophyStem CellsMuscle FatigueMice, Inbred C57BLRNA, MessengerMuscle DenervationMuscular DiseasesMuscle, Smooth, VascularExerciseRNA, SatelliteSignal TransductionGene Expression RegulationQuadriceps MuscleGlycogenIsometric ContractionMuscle CellsMyostatinAging