National Fitness Day 2015 kicked off this morning (9 September), making a major impact online as well as in the nation’s health clubs.

The ukactive-led event, dubbed “the most active day of the year” was among the top trending topics on Twitter this morning, as thousands of users tweeted snaps and snippets of their exercise for the day.

More than 2,000 health clubs across the country – including major operators such as Fitness First, Parkwood Leisure and Places for People Leisure – are laying on a total of 10,000 classes to celebrate the day.

Another aspect of this year’s push is to get schools involved, with each participating site receiving a tailored toolkit of information to help them put on a whole day of activities across the curriculum. Efforts are being focused on getting children of all ages to positively engage with physical activity, building habits that will set them up to be an active adult.

Meanwhile, a number of high-profile MPs such as Diane Abbott and Caroline Nokes have pledged to ‘move for their seat’ as part of the campaign. Throughout National Fitness Day, MPs will track their activity levels using either a Myzone MZ-3 heart-rate tracking belt, or a Fitlinxx Pebble+ accelerometer device, to record their activity throughout the campaign and see how representatives of each political party measures up against the others.

“National Fitness Day is a great opportunity to not only see how active our MPs are when compared to their counterparts on the other side of the house, but it also gives them a chance to discuss and engage with their constituents on the many health advantages that come from being physically active,” said ukactive chair Baroness Tanni Grey-Thompson.

“That is why we want to work with parliamentarians so they get involved and help the nation have the most active day of the year.”