strain them, tear them, bruise them
yes you can hurt your muscles
The reason your muscles hurt after track is because you have been running and using muscles that aren't normally used. Often if you stress before you start doing track, they will not hurt as bad afterwards.
yes they can
Your muscles are the strongest parts of your body, even if you work you muscles to exhaustion, they will not hurt. It takes an awful lot to make your muscles hurt.
where your muscles hurt
yes you can by pulling them or the tendon around them,
hamstring
If your muscles hurt, it might be from over exercising them. Just let them rest a little, they may be sore. If they hurt a lot you should go to a doctor.
Probably because swimming uses a lot of muscles and you aren't used to using those muscles.
because you have the muscles to help you if you get hurt
The jaw muscles are powerful.
when you are running a lot your lungs hurt cause you have baby muscles because my lungs hurt when i run a lot and my trainer said that's why your lungs hurt