Some time back, we ran a book extract from Cruise Yourself Slim suggesting you could loose weight on a cruise holiday. But this MSC cruise takes working out on board to a whole new level. Forget the gourmet restaurants, celebrity chefs and top shelf wines. Now, every aspect of your journey is designed to produce a new, sculptured you. Of course, you get a phone app to measure your progress. And a doctor’s check up. Sound like fun? We’re not sure. Would you go on a gym journey? Tell us what you think.