A man of 83 was yesterday in a “critical” condition after collapsing while swimming at Huddersfield Sports Centre.
The man, a regular at the baths, suffered a suspected heart attack.
He is believed to have swum a length-and-a-half of the pool when he started to feel unwell.
A friend who was with him raised the alarm and two lifeguards pulled him out of the water.
He collapsed on the poolside and staff administered CPR.
An alarm was sounded and paramedics and police were called.
It remained closed for most of the morning.
Paramedics worked on the man for at least 20 minutes before he was taken to Huddersfield Royal Infirmary.
He went to accident and emergency before being transferred to the intensive care unit.
His condition was yesterday described as “critical.”
Kirklees Active Leisure, which runs the sports centre, praised staff for their prompt action.
A spokesman said: “The staff acted with great speed and professionalism.
“The man is a regular swimmer at the sports centre and staff are quite upset.
“Our thoughts and best wishes go to both him and his family.”
It is the second time in two months that staff at the sports centre have responded to an emergency situation.
In September a gymnast was hurt in a freak accident when she came off a trampoline, hit the poolside and fell into the water.
The girl was rescued by pool lifeguards and has now made a full recovery.
West Yorkshire Police attended the sports centre yesterday and a spokesman confirmed it was being treated as a “medical episode” and there were no suspicious circumstances.