In this day and age though we know amphetamines to be catabolic. Unless it's a serious low dose I would say your putting uneccesary pressure on your organs. Take one or the other. They didn't give the soldiers meth and steroids to make them live a long healthy and prosperous life now did they? Taking amphetamine on its own and training is putting enough stress on your heart.
OP do you have ADHD? You never specified this. If you do not, then I agree with Sid you do not need this vyvanse in your body. If you do have ADHD then I say go ahead and do not worry about a thing.
I've been on amphetamines 8 years since I was 20 years old, and I've taken 6 cycles since then. No problems. Always work out, and always eat as much as possible during the day unless you're cutting ofcourse.
What the hell are you asking here?
Should you take Test and Var to counteract the catabolic effects of your vyvanse?
Absolutely not. Vyvanse is something you take everyday to treat ADHD. So WTF is the difference if as soon as you cycle off the Test and Var you'll begin feeling the catabolic effects of vyvanse again? What are you going to take Test now for the rest of your life? Or the rest of the time you're on vyvanse, which could be years? Certainly not.
The answer is learn how to manage your vyvanse and it only becomes catabolic if you let it become so. I personally find my Adderall is an amazing body building tool that I can use to control my appetite when need be or give me energy and still allow me to eat 10,000 cals a day and keep my metabolism up. It only gets catabolic let's say if you're on a big dose of it, and you have a job as a construction worker, and start skipping meals....and doing long sessions of cardio...etc
You maintain a steady healthy diet and exercise routine, and that's it. When you want to cycle go ahead.
If you're curious about Hitler I suggest reading official information on him as opposed to asking it on here.