I would wager that woman: a) Doesn't really eat 1000 kcals a day if she's active, and should, instead of building a diet by counting calories (doing which she'

I would wager that woman: a) Doesn't really eat 1000 kcals a day if she's active, and should, instead of building a diet by counting calories (doing which she's prone to miscalculation), simply eat less of whatever she usually eats. b) Doesn't need to lose half a kg of fat every week.