I remember when i was at monarch every year you would do what they call a line check.This was bad enough as it was with the 25 sep and medical questions that you had to do but then it was time to be weighed. Anyone who had put a lot weight on would be grounded until they had got back down to their ideal weight .It might help if they stopped putting chocolate bars and biscuits on board the a/c ,fab when your 19 yrs old not so fab in your late 30s with no will-power, but most monarch crew , the same as most charter crew look fantastic .