Pneumomediastinum is an uncommon complication of sporting activity. Th
e case of a young asthmatic surf lifesaver is reported in which severa
l factors are thought to have been involved in the aetiology of his co
ndition. Treatment was expectant and a full recovery was made over a s
hort period. This is the first reported case of pneumomediastinum occu
rring following training for a surf belt race.