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Genetics, a shared social environment and lastly a shared physical environment! And the person above me is also correct to :)
Well I do not know what activity you chose but warming up your muscles before and workout helps loosen them up and help reduce straining and tight muscles during physical activity. Doing a cool down is the same as warming up. Cool down loosens up the muscles since they have been worked and stressed during an exercise.
Hope this helps!
The insurance company may deny an insurance claim if they find out that the information is incorrect and it does not have all the details.