A week out from Christmas, my editor dropped me a note: 'Any interest in a daily kettlebell swing challenge – 300 per day for 30 days,' he asked. At the time I was more concerned with how many mince ...

Gerard Butler dedicated eight months of his life to becoming King Leonidas in 300, with much of that time spent in the gym building a physique worthy of a Spartan warrior. He regards the training as ...