Not sure if people outside the UK will be able to access this BBC radio programme, I should think so. It's called 'Inside Health' and my own assessment of it is that it is a very responsible source of information. Today's broadcast 'Health and Exercise' is one of the most persuasive discussions of this topic I've come across. One thing that jumped out at me is that exercise helps reduce inflammation. I think the way to hear it again is to click on the 'episodes' tab.
If you're working hard to keep moving and wonder whether it's worth it I reckon this will really buoy you up. And if you're struggling to find the motivation to get started it might just give you the extra conviction you need.