Multiple paralympic gold medalist Baroness Tanni Grey-Thompson has kicked off a #Fitness2me campaign to celebrate the power of physical activity ahead of National Fitness Day 2016, which takes place in September.

Baroness Grey-Thompson launched the campaign live on Sky News and it has already attracted support from the likes of British Olympian Iwan Thomas. The initiative asks people to write down what fitness means to them and share a picture of them holding the paper on Twitter under the hashtags #FitnessDay and #Fitness2me.

Now in its sixth year, National Fitness Day will take place on Wednesday 7 September and is the biggest annual celebration of fitness and physical activity across the UK. The aim is to inspire people to get moving while making it easy and fun.

More than 4,000 sites will hold events, with leisure venues holding free physical activity taster sessions. People will be given access to gyms, health clubs, leisure centres and park sessions. Argos, a headline partner for the event, will be offering a range of activities throughout its 842 stores.

In addition, a social media Thunderclap is underway to provide a unified message from all supporters and event holders on National Fitness Day. Pledging support allows a single message to be shared on your behalf from a Twitter or Facebook page.

Grey-Thompson, who won 16 paralympic medals including 11 golds, is the chair of ukactive, which is a lead partner of the event. She said: “#Fitness2me is a great opportunity for people to celebrate and share their own unique relationship with physical activity.

“For me personally, it once would have meant being in peak physical shape for a tilt at Paralympic gold; but today it represents the importance of keeping active so that I can play a central role in the life of my teenage daughter – hopefully into my 80s and beyond.

“With physical inactivity currently high on the health agenda, there is significant growth potential for the sector if we can make exercise more accessible and engage wider demographics in physical activity.

“National Fitness Day will help to kick-start this opportunity by offering thousands of sessions where people can become more involved with their local communities and have fun getting active.”

Operators and suppliers in the sector who are yet to sign up can still get involved. Further details can be found at www.nationalfitnessday.com