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ROR Labs — Return on Risk
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Everyday risk, examined with evidence

What the research actually measured about the risks people face, and where the usual advice gets it wrong.

  • School Shootings: What the Evidence Shows
    Social Risk | Youth and Digital Life

    School Shootings: What the Evidence Shows

    BySeung Hyoun Kim October 16, 2026October 16, 2026

    File photo: a school building. Photo: Johny Rebel, the Explorer Panda, via Wikimedia Commons, CC0. In the news · October 2026 A report card from the advocacy group End Gun Violence Michigan gave more than 58% of the state’s 593 public school districts an F for telling parents about safe firearm storage. Since 2025, Michigan…

    Read More School Shootings: What the Evidence ShowsContinue

  • Badminton shoulder pain and the smash
    Badminton

    Badminton shoulder pain, the smash and what prevention trials actually show

    BySeung Hyoun Kim October 16, 2026

    File photo: a badminton player on an indoor court, September 2012. Photo: Sabit Tisekar, via Wikimedia Commons, CC BY 2.0. In the news · August 2026 Before the World Championships in India, India’s Satwiksairaj Rankireddy called his shoulder problem “on and off all the time” and frustrating after mid-match retirements and withdrawals at the Indonesia…

    Read More Badminton shoulder pain, the smash and what prevention trials actually showContinue

  • Badminton and sudden cardiac arrest
    Badminton

    Badminton and sudden cardiac arrest, and the minutes that decide survival

    BySeung Hyoun Kim October 16, 2026

    File photo: a public-access defibrillator on a street wall in Nijmegen, the Netherlands, October 2025. Photo: Jxpsert, via Wikimedia Commons, CC0. In the news · October 2026 A 75-year-old man who went into cardiac arrest just after finishing a game of badminton at a leisure centre in Livingston, Scotland, in May 2026 survived after the…

    Read More Badminton and sudden cardiac arrest, and the minutes that decide survivalContinue

  • Golf ball strikes and eye injuries
    Golf

    Golf ball strikes, and what a 171 mph drive can do to an eye

    BySeung Hyoun Kim October 15, 2026

    File photo: Gávea Golf and Country Club, Rio de Janeiro, with apartment blocks beside the course, July 2013. Photo: Leonardo Shinagawa, via Wikimedia Commons, CC BY 2.0. In the news · January 2026 An InvestigateTV report from Marietta, Georgia, followed neighbours living across from a country club hole who say errant balls have broken windows,…

    Read More Golf ball strikes, and what a 171 mph drive can do to an eyeContinue

  • Golf swing injuries to the back and wrist
    Golf

    Golf swing injuries to the back and wrist, and the way back after surgery

    BySeung Hyoun Kim October 15, 2026

    File photo: a golfer driving off the tee, December 2015. Photo: Pexels, via Wikimedia Commons, CC0. In the news · March 2025 Barrow Neurological Institute in Phoenix announced a spine biomechanics lab to study whether the modern golf swing contributes to back pain, and when injured golfers can safely return. The $1 million to set…

    Read More Golf swing injuries to the back and wrist, and the way back after surgeryContinue

  • 20 dB cut by one fence: an 11.5-foot barrier cut pickleball's loudest moments by 20 decibels at a nearby home
    Pickleball

    Pickleball noise, and why one fence cut the pop by 20 decibels

    BySeung Hyoun Kim October 14, 2026

    File photo: public pickleball courts in La Crosse, Wisconsin, October 2023. Photo: Wikideas1, via Wikimedia Commons, CC0. In the news · March 2026 The city council in Martinez, California, voted to permanently close eight pickleball courts at the Hidden Valley sports courts, only a year after they opened, following neighbours’ complaints about noise, trash and…

    Read More Pickleball noise, and why one fence cut the pop by 20 decibelsContinue

  • 60, median age at repair: pickleball's share of Achilles tendon repairs rose from 0.5% to 6.7% in three years
    Pickleball

    Pickleball Achilles tendon ruptures, and why the typical patient is 60

    BySeung Hyoun Kim October 14, 2026

    File photo: pickleball doubles on the sports court of a cruise ship, March 2025. Photo: Larry D. Moore, via Wikimedia Commons, CC BY 4.0. In the news · September 2026 An Australian report on the pickleball boom quoted a Wollongong foot and ankle surgeon, Meghan Dares, warning that people underestimate the load a small court…

    Read More Pickleball Achilles tendon ruptures, and why the typical patient is 60Continue

  • 85% scans abnormal: 28 of 33 elite teenage tennis players without back pain had an abnormal lumbar MRI
    Tennis

    Tennis lower back pain, and the scans of players who felt fine

    BySeung Hyoun Kim October 13, 2026

    File photo: a player prepares to serve on a grass court, June 2011. Photo: Daniel from Galashiels, via Wikimedia Commons, CC BY 2.0. In the news · February 2026 The ATP reported that Arthur Fils, sidelined for about eight months by a stress fracture in his lower back that forced him out of Roland Garros…

    Read More Tennis lower back pain, and the scans of players who felt fineContinue

  • 2x retirements vs grass: hard and clay courts saw twice the retirements of grass in men's pro tennis
    Tennis

    Tennis court surfaces, and why grass sees half the retirements

    BySeung Hyoun Kim October 13, 2026

    File photo: a men’s singles match on Centre Court, Wimbledon, June 2005. Photo: Spiralz, via Wikimedia Commons, CC BY 2.0. In the news · October 2025 After a run of injuries on the Asian hard-court swing, AFP reported that the world number one, Carlos Alcaraz, had pulled out of the Shanghai Masters citing physical issues…

    Read More Tennis court surfaces, and why grass sees half the retirementsContinue

  • Cricket umpire injuries: a 142 km/h drive reaches the bowler's-end umpire in about half a second
    Cricket

    Cricket umpires and fielders struck by the ball, half a second from bat to umpire

    BySeung Hyoun Kim October 12, 2026

    File photo: an umpire signals a wide in junior cricket, June 2008. Photo: Dion Gillard, via Wikimedia Commons, CC BY 2.0. In the news · August 2026 During a Delhi Premier League match, umpire Dharmesh Bhardwaj was struck on the right side of the face by a straight drive and, according to reports, admitted to…

    Read More Cricket umpires and fielders struck by the ball, half a second from bat to umpireContinue

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