this is odd - I've somehow managed to put on about a stone (dammit!) in the last 8 months, and so joined a sports club 3 weeks ago and have been religiously flinging myself around various sports halls 4 times a week, sweating buckets and looking fabulous! My question is - why do I still weigh the same? I know I'm thinnner, as I can get back into my jeans again. What's going on?
Muscle weighs a lot heavier than fat so it takes up a lot less space.
If your club has one - start using the body fat monitor - this will show the per centage of body fat. Over time you will see it reduce, even if your weight doesn't.