Brisbane boy, 15, injured in gym work out

A Brisbane gym where a teenage boy suffered serious injury after being trapped under equipment while exercising has been closed for investigations.

Staff at the Pine Rivers PCYC administered first aid to the boy before paramedics arrived and took him to Lady Cilento Hospital in a serious condition on Tuesday evening.

The 15-year-old's neck was reportedly pinned by equipment while he was working out.

"We are deeply saddened by this incident and are offering support to all PCYC Pine Rivers members and staff," PCYC Queensland chief Phil Schultz said.

"We will also offer support to family and friends of the young man involved."

Worksafe Queensland has launched an investigation and the Pine Rivers PCYC has been closed until further notice.