When you are working out it can be nice to talk to people with the same interest. By visiting a forum you can get advice on everything that is related to fitness.

But finding the best fitness forums can be tricky so I've searched and here is a list of well known and visited forums that you can discuss fitness at.
I hope you find a forum that suits you and your goals and needs.

Discuss Fitness Here you can discuss everything related to fitness.
Body Building.com For you that is interested in bodybuildning especially
Vegan Fitness Are you a vegan and want to get fit? This is your place!
Elite fitness Bodybuildning forum
Discuss Body Building the name says it all.
Fitness forums.org Another well visited fitness forum
Fitness training Here you can even start your own fitness journal.
Shape Fit For your everyday fitness
Muscle and fitness Hers Another daily forum.

Have I missed a great forum? Please tell me and I will add it!