[exercise physiologist voice]the VO2 max, or graded exercise test can be conducted using either a treadmill (for runners) or a cycle ergometer (a fancy bike that is calibrated so you know how exactly what the resistance is). For both of them you are connected via face mask/mouthpiece to a machine that analyzes the air you exhale, thereby being able to know how much oxygen you consume.<br><br>
The TM version you will start running at an easy pace, at a predetermined interval the speed and/or the incline will be increased. The goal is for the test to last approximately 8-12 minutes. The goal of the test is for the subject to run to volitional failure - until you can't physically run another step.[/exercise physiologist voice]<br><br>
they aren't the most fun thing ever. costs can vary, but the route to go is to get one for free - all you need to do is find a college/university near you and contact the exercisy physiology department and see if you qualify for any studies that they have going on currently - how I was able to all of the times I've undergone the procedure.