Hired a personal trainer who owns a private gym (not a large corporate chain personal trainer). Wish I had done it years ago to avoid back problems, but better

Hired a personal trainer who owns a private gym (not a large corporate chain personal trainer). Wish I had done it years ago to avoid back problems, but better late than never. Another thing I've tried, though less successfully, is to set an alarm for 20-30 minutes to get away from the screen. The key here is to put your phone out of arms reach so you have to get up to shut off the alarm.