Six Minutes of Hard-Core Exercise Per Week May Be Enough Contributed by Ron Gara| 06 June, 2005 23:31 GMT 'This type of training is very demanding and requires a high level of motivation. However less frequent, higher intensity exercise can indeed lead to improvements in health and fitness.' Fitness experts have suggested an alluring prospect for people who want to stay fit but can't afford to spend long hours in the gym: Just six minutes of intense exercise a week could be as effective as an hour of daily moderate activity. "Short bouts of very intense exercise improved muscle...