Every year, I participate in a martial arts tournament that takes place in an air-conditioned grand ballroom of a hotel. The way the tournament works is that people are split into several divisions (by age, skill level, style, sex, etc.) which are held throughout the day. There number of people in a division can vary, and the scheduling (though continuous) can be fragmented for an individual participant.
What my problem is that when I participate in these competitions, I am usually not warmed up enough to the point where I am most physically capable (something I feel in terms of flexibility). The number of participants in the divisions I participate in can reach upwards of 20 people (at least) while the actual martial demonstration might span anywhere from 30 seconds to 2 minutes.
Because of the enormous amounts of waiting involved in this tournament and the cooling air temperature in the hotel, my body is terribly stiff for every performance I do and not as good as it could be. Though I can warm up my body before starting the competition, it is not so easy to simply walk away in the middle of a division (unless you're doing multiple divisions that conflict and are running back and forth). Everyone typically stays in place until it is over.
Given the fragmentation of the physical expenditures and the air temperature around me, are there exercises that will help me in this situation? What effect will the intensity and duration of such exercises have on keeping my core temperature warm?
For reference, what I wear is a silk suit which is not the most breathable fabric. It's very thin and light. In addition to warm-ups, will athletic clothing help in any way?