![Virgin Active launches The Grid obstacle course burning 900 calories in just 30 minutes | Daily Mail Online Virgin Active launches The Grid obstacle course burning 900 calories in just 30 minutes | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2015/01/07/247C3F7100000578-0-image-a-97_1420649924265.jpg)
Virgin Active launches The Grid obstacle course burning 900 calories in just 30 minutes | Daily Mail Online
![Virgin Active launches The Grid obstacle course burning 900 calories in just 30 minutes | Daily Mail Online Virgin Active launches The Grid obstacle course burning 900 calories in just 30 minutes | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2015/01/07/247BF1B800000578-2900703-image-a-92_1420649460642.jpg)
Virgin Active launches The Grid obstacle course burning 900 calories in just 30 minutes | Daily Mail Online
![Virgin Active launches The Grid obstacle course burning 900 calories in just 30 minutes | Daily Mail Online Virgin Active launches The Grid obstacle course burning 900 calories in just 30 minutes | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2015/01/07/247BF28500000578-2900703-image-a-15_1420662286380.jpg)
Virgin Active launches The Grid obstacle course burning 900 calories in just 30 minutes | Daily Mail Online
![Virgin Active launches The Grid obstacle course burning 900 calories in just 30 minutes | Daily Mail Online Virgin Active launches The Grid obstacle course burning 900 calories in just 30 minutes | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2015/01/07/247BF29000000578-2900703-image-a-91_1420649457453.jpg)