Hi, I am 5 foot 2 10 st 6 and age 63. I want to get to around 9st 7. My tdee is 1609. If I reduce my calories by 500 to lose one pound per week, is 1109 calories not too low please. I have put myself as lightly active as I do 3 x 30 mins per week Rosemary Conley dvd, 4 x 15 mins per week all over body exercise from you tube.Any advice much appreciated .