Pulled muscle in my armpit?

We did a lot of different excercises and stretches in gym yesterday and I woke up this morning with my calf feeling very stif...

wahts the best thing too do furr a pulled muscle in the back and in the shoulder area??

Well I jog everyday for about an hour to stay healthy but when I do this everyday I always get hurt. Right now one of my ankl...

I cant get a pull up bar cause my doors cannot he used with those door pull up bars. So I have to use the resistance bands. I...

Is jogging enough to build your legs or would you have to do leg presses and etc? I just usually do push ups, sit ups, pull ...

What are some good ways to develop fast twitch muscle fiber? Anyone know?

I don't even know if that's what it's called..I mean like, what can you not do if you tear it? Or do you need to have surgery...

I heard that when running, the most used muscle is your abdomnal??? is it true??

what are the major superficial muscle groups? what do they do? how do they work?

Does squeezing your tummy muscles help tone up?