I would say it is not waste of time, even a little.
For better impact - do it right after every meal, even if it's just short walk around the house. There are studies that even light short exercise right after a meal have positive impact on insulin sensitivity, and in turn, on blood sugar levels (and mood to some degree).

Anonymous wrote:

Anonymous wrote:Not at all a waste of time. But try to push yourself a little bit more each time.

+1. Exercise is about showing yourself what your body can do. If right now, your body can jump rope for two minutes, do that and watch as it becomes three over time. Or do two minutes a couple times a day.

I'm am solidly in the every little bit counts camp because every little bit often evolves into a little bit more.

+1
Start with a little. If you don't, it will never become a lot. Over time, you'll realize that you can jump rope for three minutes, then four or five. You realize that you can walk at a brisk for a half a mile, then a mile, then a couple of miles. Then you can do a more strenuous hike, or start jogging. You can't go zero to sixty overnight, but each little bit builds a little bit of strength or endurance or speed, and it adds up.