the research metric I'm interested in is "if you exercise for 5 minutes, you should expect to live 1 minute longer" and I would look at that and say "so I lost 4 mins? no thanks"
but if it ever comes out with a surplus, I'll turn on a dime (and turning on a dime for 5 minutes a day probably lowers blood pressure)
it would be more like: if you exercise for 5 minutes, you should expect to live 1 day longer
You need to consider quality of life too. Maybe you only gain one minute, but you'll age much better with a habit of exercise and stretching.