Royal Marines: Body monitors to prevent training deaths

Body monitors have been introduced for trainee Royal Marines Commandos to try to prevent death or serious injury during extreme training.

The technology is "helping to eliminate the risk of potentially fatal heat illness," the Royal Navy said.

The kit records trainees' physiological data, which trained instructors then study. So far, more than 200 recruits have used the technology.

The Royal Navy said it had already saved one person's life.

First used in the spring, it had also prevented two very serious casualties at Commando Training Centre Royal Marines at Lympstone, near Exeter, the Royal Navy added.

The monitor, known as Open Body Area Network (OBAN), records key features as a trainee tackles activities, such as a "nine-mile speed march" or "gruelling 30-miler".