I signed up for fitday.com to see how many calories I was burning on a daily basis to see how much I should be eating... it reckons 2500 on a normal day and 2900 on a gym day????? Surely that can't be right?? Does that mean I should be eating 2000 calories to lose about 1/2 a kg per week? Just seems like a lot more than I was expecting :-/