you generally do a VO2 max test on a treadmill or a turbo trainer, cos you need to be hooked up to a mouthpiece that captures your breath and measures what you're breathing out. you need to be able to steadily increase the intensity of the test in a controlled fashion (ie increase the speed or incline of a treadmill, or increase the resistance on a bike). the beep test is designed to simulate the VO2 max test without the proper equipment, but it's nowhere near as accurate.
you generally do a VO2 max test on a treadmill or a turbo trainer, cos you need to be hooked up to a mouthpiece that captures your breath and measures what you're breathing out. you need to be able to steadily increase the intensity of the test in a controlled fashion (ie increase the speed or incline of a treadmill, or increase the resistance on a bike). the beep test is designed to simulate the VO2 max test without the proper equipment, but it's nowhere near as accurate.