want to lose 5stones worried about saggin skin & wrinkles

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ok so started the diet Cpl weeks ago, lost 7lbs so far but just occurred to me I have such a large amt to lose how do I minimise sagging skin - what sort of exercise should I do and should I start now, really considering a personal trainer

also worried my face will look older, im 43 and don't look my age possibly because the fat is plumping my skin out a little any tips here ?

thanks

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