Yes, this is copied from Air Tran's site:
Exit Row Seating. Exit row coach seating (with additional leg room) is also available for purchase. All customers choosing exit row seating (whether purchased in advance or assigned at check-in) must meet certain requirements to qualify for exit row seating. You must be:
15 years of age or older
Willing and able to help in the event of an emergency
Not traveling with an infant, children or pets
Able to speak and understand English
Able to lift 50 pounds
Not using a seat belt extender (which could get tangled in an emergency)
http://www.airtran.com/faq/q/how_can_i_reserve_my_seat_before_the_flight.aspx?tt=Seat+Assignments&rt=index_faqs&nav_id=85