my hypothesis on my suan legs

i have a theory on why i have that suan calves feeling that makes me wanna stretch. maybe cos i learn dance and after much stretching and practices my whatever that is called("jin") gets stretched and is longer. .so once i stop stretching.. it kinds of gets shroter by the time or smthing..like a rubberband. so when it is erm destretching.. maybe that feeling will feel suan. so wanna stretch it back.