To prepare for the Games, Harland and Allenby have been undertaking four separate training sessions every day to cover the diversity of skills and fitness required in the event.
In an average week they will have five shooting sessions and six of fencing, swim four times, have two riding sessions and five training runs.
The sport's world-class programme, based at Bath University, has replaced the rather outdated methods Cook, Allenby and Harland worked with before the 2000 Games.
"I remember fencing practice in a smelly village hall, where we had to carry these 14 huge blocks of metal out into the middle of the room to create a platform and then carry them back again when we had finished," said Allenby.