Traditionally there is a receiving line at a wedding where the newlywed couple and their respective families will stand in a line and receive their guests at the beginning of the reception. Now as the royal weddings tend to have a very large guest list, guests are expected to greet the royal couple quickly and move along. You are not supposed to stand there and engage them in a long winded conversation as they have upwards of 600 guests to greet.
Staying fit is certainly a commitment. Besides doing the physical training, there are some other factors to consider, like nutrition