I foind even if your not a gym queen, just increasing what you do, do (if nothing then walking/jogging) if you walk walk longer etc,if you find running to hard on the knees try cycling as its a less load bearing activity.
As for diet water is the best appetite supressor, so keep dinking small amounts during the day along with small amounts of nutritious food ie.not mac D`s or BK just small amounts throughout the day will stop you feeling lathargic and bloated, ie if you eat 3 heavy big meals a day it takes longer to digest and makes you feel uncomfortable for prolonged periods.Try not to eat just before sleeping and remember breakfast is the best meal to eat as it fires the metabolism tostart the body burning calories all day...

sorry if i bored you all to tears!

lateRS