Join the 6-week weight loss challenge: https://briansyuki.com/your-challenge/

This standing abs workout to tone your tummy is very doable even if you're out of shape. The ab exercises are very simple and easy on the back.
If you suffer back pain after doing floor ab exercises, I advise you switch to standing abs workouts to burn more calories and protect your back.
Remember to squeeze your abs in every rep in order to get the most out of the workout.
Enjoy the standing abs workout to tone your tummy.