If you eat right but half the amount that you usually would then you will
begin to lose a bit. Put some exercise on top of that - which will keep you stronger- and you will be feeling better.
I am on the opposite end right now where I have to eat three times as much
because I need to gain five pounds and haven't been able to... but I have
to say that the exercise helps me to keep my muscle strength and to feel
stronger and healthier.
Good luck to you - we all have things to accomplish!