Spending just 60 seconds a day on a simple movement, like doing sit-to-stands...

https://astro-wiki.win/index.php/Is_a_60-Second_Sprint_Safe_for_People_Who_Never_Run%3F

Spending just 60 seconds a day on a simple movement, like doing sit-to-stands from a chair, could gently support your overall health as you age. While it’s no magic bullet, this brief activity helps maintain muscle strength and mobility