Man critical after Brisbane gym incident

"His injuries were very severe, so we dispatched two crews, including a critical care paramedic," he said.

Bystanders began first aid before paramedics arrived. The man was later transported to hospital.

He is estimated to be between 25 and 35 years old.

"He was, like most people, just working out in the gym ... and for whatever reason ... a weight has fallen on his body and he suffered serious injuries," Mr Parker said.