I hate sport & have always struggled with exercising. Was a bit of a blob, especially round the middle. But over the past few weeks I have firmed up, improved my posture and lost weight, and it's all due to ... ta dah!...
Watching Pointless and/or Eggheads each day while using...
A HULA HOOP 
DD bought one last year after seeing Grace Jones using one at the Jubilee concert, then left it behind when she went to Uni in Sept. I tried it & couldn't get the hang of it at first, then it suddenly clicked, & I've got into the habit of giving it a go when I'm watching TV alone. 10 mins, then sit down for 10 mins.
So over the past few weeks I've done this & also done some stretches before & after, just touch toes, shrug shoulders etc., & have noticed that my stomach seems firmer & I can stand up straighter.
This morning I weighed myself & I've gone from 10 stone at Christmas to 9.3 