I don't believe in team motivation. I believe in getting a team prepared so it knows it will have the necessary confidence when it steps on a field and be prepared to play a good game.
Humanitarian missions are little different from any other public enterprise, diplomacy included, which is susceptible of misinterpretation by the public, hence ultimately of failure.
Some people are naturally thin and some people are naturally heavier. It doesn't mean that bigger is healthier, or much thinner is healthier, it's on an individual basis.