Hi guys, we are building an app - TimeFit - that I think addresses this issue.
The short description of what we do is: During a break from work the app will give you advice on what physical exercises you should do, what exercises for eyes and what snacks to eat.
We have called a break during which you try to do the recommended activities a Power Break as it enhances your productivity and wellbeing. You don't need to do a Power Break every time you take a break but three or four times a day will give you a great boost.
Please check our page for designs: https://www.timefit.mobi
Let me know what you guys think about this idea. We will very much appreciate any feedback :)