No amount of sit-ups will tighten saggy skin! A tummy tuck – or abdominoplasty – is the only permanent approach. The amount of loose skin there dictates whether you’ll have a mini tuck or a full-on procedure. The traditional tummy tuck removes saggy skin and repairs stretched muscles. It can be painful and leave scarring, with at least a month’s recovery time, and final results won’t be noticeable for several months. From £5,000.