Similar story here for most of the last year. Previously I've had a long (walking) commute to work, enjoyed swimming, running and/or mountain biking. I tried HIIT briefly last year but couldn't find a way to reliably include it in my routine. Just started swimming a few weeks back and think I will maintain that longer term. People will tell you to do x/y/z thing, the truth is you need to find something which works for you and becomes a habit and you can fit into your schedule long term. That could be lifting, swimming, zumba classes, whatever.

Either that or decide you're OK with poor health and a shorter than necessary life! :)