Dear Bikelet:

Heredity may have some to do with your tight muscles. However, I am not totally sold on this option. Sometimes we imitate one parent over another. So, if your mother is more hyper than your dad and you tend to imitate her, It may be that is is habit as opposed to heredity. The old debate of Nutrue vs nature.

If we take the view that IF it is heredity, then why do all floor installers have similar complaints, while most computer or key punch operators have another. They are not all related, SO IT CANNOT BE THE "HEREDITORY" FACTOR. However, in a family, some imitate one parent over another (nurture) or it can be heredity (nature). But do not blame heredity until you know.

Hope that this is helpful.

\Best regards,

Neuromuscular