|MadSci Network: General Biology|
Noam, There are many muscles in our body that we use almost continuously - in our gut, our heart - etc. Even when we are resting, all of our "ordinary" muscles - I mean those attached to our skeleton - have "tone", which means that they are working, producing tension to keep our body in position, and ready to move. That is why a living person's (or animal's) flesh feels firm compared to a freshly dead one - but most people never get the chance to test this ! So, even though most muscles are doing something most of the time, they do not normally grow like a body-builder's. Your muscles (and skeleton) continuously change in shape and size by very small amounts to keep pace with your lifestyle, but to make muscles grow unusually big, you need to take unusual exercise - like working out on special machines for long periods in a gym. This is basically unnatural, and therefore bad. Unfortunately, these days, we are bombarded with images of immensely muscular men and painfully thin women, and must learn to see them as the freaks they are. Talk away, Noam, and don't worry about your tongue - it has been very well designed !
Try the links in the MadSci Library for more information on General Biology.