An average day in the life of a champion heptathlete isn't a dry run of the seven disciplines, but a focused day of building general fitness.
Nutrition is crucial too. Jessica Ennis says, 'People expect athletes to be on a really strict diet but it's about making sure you've got the energy to compete and recover - not dieting.
'I have a really sweet tooth, but I train hard so I can enjoy the odd chocolate brownie safe in the knowledge I'll burn it off.'
But enough of food. Here are the exercises that could earn you abs like golden girl Jess.
Do three sets of the exercises listed below.
First set: Perform each move for 20 seconds, then rest for 10 seconds.
Second set: Perform each move for 30 seconds, then rest for 15 seconds.
Third set: Perform each move for 20 seconds, then rest for 10 seconds.
Read about Zest Deputy Features Editor Laura Potter's day training with Jessica Ennis in the March 2012 issue of Zest magazine. Download back copies via the Zest app here.