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World Record Holders | Extreme Sports Athletes | Power Duo
Julia and Stephanie, known as the Squattwins, are twin sisters from Germany who have taken the world of extreme sports and endurance records by storm. Known for their unstoppable energy, discipline, and teamwork, they’ve set multiple official world records—often for charity and always with an inspiring message behind their feats.
The Squattwins – Julia and Stephanie – are officially 10-time world record holders. Here's a summary of all 10 records they’ve achieved:
24-Hour StairMaster World Record (2025)
125,000 steps per person, 20,000 calories burned, live at FIBO Cologne.
The equivalent of climbing Mount Everest over three times – without ever leaving the venue.
10,695 Meters of Free Fall (2022)
115 jumps each from a 109-meter tower ("Voltrum").
An adrenaline-fueled record to raise funds for children’s cancer research.
12-Hour House Running (2024)
Repeatedly ran up 13 floors and rappelled down the outside of the building – 12,000 vertical meters in total.
Urban extreme sport at its finest – wall-running meets endurance challenge.
50.4 km Tobogganing + 7,200 m Uphill (2021)
Nonstop for 12 hours on a summer toboggan track in Immenstadt.
Endurance, thrill, and elevation gain all in one epic ride.
13.76 km Sliding + 86 km Uphill Running (2021)
24-hour challenge: 172 slides down a wooden mega-slide and 86 km uphill runs at 6% incline.
Childhood fun meets elite endurance.
12-Hour Indoor Cycling (2024)
1,100.7 km covered, 2.5 million watts generated – all for charity.
Pushing the limits of stamina on stationary bikes.
26 Hours of Table Soccer (2024)
Played foosball for over a day against 53 teams – all in the name of inclusion and awareness.
A mental and physical test of focus and fun.
Media Appearances:
TV Shows: Reality Show Featured on The Super Twins (VOX/RTL+), Das Supertalent (RTL), and Race to the Million (ProSieben).
More Info:
Website: squattwins.com
Instagram: @squattwins
Facebook: Squattwins Official
Events in which he is the protagonist
Twinsister. One Dream. Ten World Records