Maybe they're waiting to see if they have enough in certain age groups to constitute a full heat.
Normally what they'll do in those situations is have some heats that have combined age groups, but always make sure the fastest eight (or fastest swimmers, if less than eight are entered in that age group) are all in the same heat.
Maybe they're waiting to see if they have enough in certain age groups to constitute a full heat.
Normally what they'll do in those situations is have some heats that have combined age groups, but always make sure the fastest eight (or fastest swimmers, if less than eight are entered in that age group) are all in the same heat.