Do the 300 workout

The following workout was devised for the cast of the film 300 and it will strip fat from your body faster than you can say 'The battle of Thermopylae'.

Personal trainer Gavin Walsh (thebootcamp.co.uk) explains how it all works: "The 300 workout is a simple exercise regime consisting of 300 reps," he says. "It's great if you're short on time and want to give your metabolism a boost. The idea is to work as quickly as you can through all 300 reps with as little rest as possible.

"The exercises target various muscle groups within the body and it therefore has a cardiovascular component, making it a very good fat loss tool. Do 25 press-ups, 25 squat-thrusts, 25 squats, 25 lunges, 50 jumping jacks, 50 bicycle crunches, 25 lunges, 25 squats, 25 squat thrusts and 25 press-ups.

Anything under five minutes is excellent, 7.5 minutes is good, 10 minutes is average and over 12.5 minutes is poor. Use it either at the end of a weights workout, after running through the park or when there isn't time to get in a full session."

Find out more about Gavin Walsh at the Boot Camp website