| Mike Lindner |
It would probably depend on what you are concentrating on. If it's maintaining a spell, then it's a standard action, so you could move around while concentrating.
Do note that in combat moving could call for a concentration check for vigorous motion while casting of 10 + spell level. This is due to normal movement in combat being a "hustle," not just casually walking around.
| Baelin |
In general, you can do anything while concentrating but it may require a Concentration check depending on what you do.
Walking should not trigger a Concentration check but running (or other vigorous movements) would. Riding a moving mount counts as Vigorous Motion for this purpose.
The list of stuff that requires Concentration checks are covered in TABLE: CONCENTRATION CHECK DCS
http://paizo.com/pathfinderRPG/prd/magic.html
| Eridan |
You can't do anything while concentrating correct (like walk)?
Concentration (to keep a spell active) is a standard action and you can do anything else (except casting spells).
Concentration: The spell lasts as long as you concentrate on it. Concentrating to maintain a spell is a standard action that does not provoke attacks of opportunity. Anything that could break your concentration when casting a spell can also break your concentration while you're maintaining one, causing the spell to end. See concentration.You can't cast a spell while concentrating on another one. Some spells last for a short time after you cease concentrating.