Quote Originally Posted by Splatcher View Post
Are they on a carpet? If so, try moving them to a hard surface. I had a set that did what you describe on carpet but were OK on a solid floor. Or you could change your running style so you're leaning forward all the time
Solid bathroom floor.

Could be onto something there Splatcher. Perhaps always leaning towards magnetic north whilst running will make me lighter? It's a long shot and I'm no physicist. But it's got to be better than dieting.