I'm in a similar situation where food scarcity frightened me into inactivity in order to preserve what little calories I had for day to day living. We're back to eating more than one small meal a day so I've decided I don't like this weak and tired feeling.
Getting back "in shape" need not take hours every day, I'm actually finding great results using only body-weight exercises(squats, pushups, etc) 2-3 times per week and plan to modify those same exercises by adding weights when I've "outgrown" them.
The key I'm finding is my "slow" movement. Walking home from work five days a week provides me with a leisurely 60 to 75 min stroll. And I do mean a no-hurry stroll; I'll literally stop and smell the flowers if I get the urge.
I found this concept of minimalist weight training at marksdailyapple.com
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