The US Health and Wellness center is located in Building 109 on GK (part of the old elementary school complex). They have cardio and weight lifting equipment along with balance balls and other assorted fitness accessories. This gym has no air conditioning, so plan accordingly.
You need an access code to unlock the door to the center. You can ask your sponsor for this information. Remember, this gym is for US personnel and their dependents only.
Located in the old elementary school gym (Building 298), check their Facebook page for more information.