Private (PTE) Foo Wei Rong Joe, 18, from 4th Battalion, Singapore Infantry Regiment, was given immediate medical attention and evacuated to Tengah Medical Centre by 6.40am, where the doctors tried to resuscitate him, said a statement from the Ministry of Defence on Tuesday.

He was sent to National University Hospital at 7.15 am.

'The SAF doctor and medic continued to resuscitate him en route to the hospital, and he arrived at 7.45am. PTE Foo was pronounced dead at 8.28am,' said Mindef.

The chin-ups, as well as some push-ups which he had completed earlier, were part of the unit's daily basic exercise routine.

Mindef is investigating the incident.