adaptationsapproachesathleticbiomechanicalcoachingconcurrentcoordinationcriticalcrossfitcuttingcyclingdevelopmentdurabilityenduranceengineeringfatigueflexibilityhrvinterventionkolielactatelongmanagementmooremusclenirsperformancephilphysiologicalphysiologypracticeprocesspsychologicalpsychologyresilientresistanceresponserunningspeedsportsprintingtermtestingthresholdstrainingultravo2maxweight