I've lost a stone in five weeks and feel great. I decided to start exercising to tone up a bit but I'm now worried about the effect it'll have on my weightloss. I've started walking my son to school and home again, meaning I'm walking four miles each day. I've really been enjoying it and was hoping that this combined with being 100% on plan would mean a good weightloss this week. However, I've just jumped on the scales at my Mum's and have put 1.5lb on!!! I know I shouldn't weigh mid week (usual weigh in is Monday) and I know they aren't the same scales but I feel gutted! I know people say you gain muscle through exercise and it weighs more than fat but I thought this was a myth? And surely I wouldn't have gained much muscle this quickly?! Help!!