I'm afraid it doesnt work like that. We all have a "Set Point" things we do or a lifestyle we lead. What we do daily or normally is Our Set Point.
Your nursing is case point, my waitressing. We both are on our feet running around for hours. Where as you lift people, I lift heavy laden trays, and boxes of varying sizes and weights putting things away or in storage. This kind of work our bodies are used to. It's our set point, its keeping us where we're at. We have to do more.
SusanB had brought this up back in March in the exercise forum. ( She too is a nurse
) But she also brought up Oprah and Bob Green's first assessment of her. Oprah was walking a mile in 18 minutes. Did 2 shows a day plus a bunch of other stuff at her formerly obese weight. She was active. Bob had seen that but he also saw that all that didnt matter. It was keeping her where she was at. He needed to find her more. So, he asked her to jog that 18 minute mile.
And thats how that incredible journey began.
We are all have busy lives and schedules. The real question is...
What's your more?