You’re not alone in your plight and I’ve written about this before. Maybe someone can find the link to the forum post.
maxVO2 is all the rage in the labs. They by a canned program that comes with their Cardio Coach or other device. They can turn the test to a low skilled operator who only has to turn it on and turn it off. These devices have dropped a lot in price recently and are advertised as another revenue stream for labs and clubs. High return on investment.
If the lab is confused by the term Aerobic Threshold don’t waste your money. maxVo2 tests often are ramped up in intensity too fast with each stage being occasionally as short as 15″. The aerobic metabolism is quite slow to respond to changes in intensity. Stages less that 3 min are unlikely to give you an accurate assessment of your aerobic systems response. Your aerobic metabolism will be playing catch up for the full test and the balance of the energy demands will be being met anaerobically. That’s not a huge (but still flawed) deal if all you want to see is maxVO2. They don’t want you to become fatigued during the run up of the test before reaching max or you won’t achieve your highest max.
Ask how long are the stages. Less than 3 min is not going to be very helpful. Ask how long you can warm up. The aerobic system needs a long warm up to get it firing on all cylinders.
I don’t have any experience with labs in S FL.