Holidays are a source of pleasure and relaxation, but they can also be a source of unhealthy take-away meals and a lapse in health and fitness. While it’s ok to let go a bit on holiday, it pays to keep tabs on those extra calories. There has been many an intrepid adventurer who has taken not just precious memories, but unwanted kilos from his or her vacation.   The good news is, campervan holidays tend to be more active, and you can usually cook your own meals. However, it’s very easy to slip into bad habits, so here are some ...