This interval based training is set to build endurance levels by increasing your heart rate and keeping it at a high level. Add this 4 minute circuit course to your endurance workouts to start your matches strong and maintain a maximum level work rate for the entire 90 minutes.<br /><br /><br /><img src="http://ll.broadbandsports.com/images/36863_thumb.jpg" alt="Nani Manchester United -Pre-season Interval Training " title="Nani Manchester United -Pre-season Interval Training " width="150" height="90" alt="Nani Manchester United -Pre-season Interval Training "/>
