Well, how long did it take you to get unfit?
After high school, my activity levels dropped drastically. My nutrition was always terrible - with the activity drop, it just started showing up. From 2000-2007, my activity levels were minimum to zero.
7-8 years of actively getting myself unfit cannot be undone in 7 days. Or 7 weeks.
In 7 months, I was able to run a half-marathon. That's something. But it was just the start.
Enough about me.
This is about you. So, how long have you spent getting and being unfit?
Prepare to spend at least 10% of that time just showing up.