One,mustwarmupInwinter,thedensityofvenuesandequipmentincreases,andtheimpactonthehumanbodyalsoincreases.Inaddition,undercoldconditions,thehumanmusclesarestiffandthejointshavepoorflexibility,andmusclestrainsorjointcontusionsarepronetooccur.Therefore,whenexercising,weshouldbeprepared,stepbystep