FatigueMuscle FatigueFatigue Syndrome, ChronicMental FatigueAbnormalities, MultipleChromosome AberrationsMuscle, SkeletalMuscle ContractionSeverity of Illness IndexIsometric ContractionQuality of LifeTime FactorsCongenital AbnormalitiesChromosome DisordersQuestionnairesPhysical EnduranceSleep DisordersElectromyographyEye AbnormalitiesMagnetic Resonance ImagingKaryotypingTreatment OutcomeFibromyalgiaNeoplasmsPainDepressionBrainAsthenopiaProspective StudiesSyndromeExerciseTorqueCase-Control StudiesFollow-Up StudiesDiaphragmAnalysis of VarianceCardiovascular AbnormalitiesChronic DiseaseCraniofacial AbnormalitiesPhysical ExertionPhenotypePrevalenceElectric StimulationMuscle StrengthRisk FactorsSkin AbnormalitiesPregnancyMultiple SclerosisMutationExercise TestUrogenital AbnormalitiesTrisomyPostpoliomyelitis SyndromeCross-Sectional StudiesSurvivorsNeurastheniaRetrospective StudiesReproducibility of ResultsMusculoskeletal AbnormalitiesSleepWork Schedule ToleranceIn Situ Hybridization, FluorescenceQuadriceps MuscleAnxietyPain MeasurementTooth AbnormalitiesReference ValuesKneeElectrocardiographyPrognosisDisease Models, AnimalCohort StudiesMotor ActivityExercise ToleranceBiomechanical PhenomenaFractures, StressMaterials TestingExercise TherapyInfant, NewbornDisorders of Excessive SomnolenceStress, MechanicalTranslocation, GeneticSensitivity and SpecificityLongitudinal StudiesAneuploidyActivities of Daily LivingMusclesStress, PsychologicalTomography, X-Ray ComputedAntineoplastic AgentsNeuropsychological TestsPredictive Value of TestsTensile StrengthSex Chromosome AberrationsPsychometricsMice, KnockoutMuscular Diseases