On days where I don’t really feel well or when time is not allowing it I will just do a portion of my workout – like a single exercise. Just to keep the habit and not stop completely.
If you do more demanding types of exercise (weight lifting or marathon preparation) you should probably read up or ask some expert on rest days. As far as I know some types of exercise if include test days if you want to prevent to hurt or over exhaust yourself.
One day badminton or roller skating for 20 min.
Keep the change so it doesn't get boring 💪
Its really inportant to have off days otherwise you might (will) get injured
Plus if you're doing intense athletics, your athletic capacity grows on off days else you dont improve
The walking I do promotes blood flow and its really relaxing
Of course if I’m feeling lazy, I’ll take a day or two off. But mostly try to stay on a routine, so my body isn’t overwhelmed suddenly by something.