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Olympic athletes turn to diabetes tech in pursuit of medals

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Updates to add U.S. approval of Abbott's prescription-free CGMs in paragraphs 10, 11

By Ludwig Burger

June 10 (Reuters) -Olympians including Dutch marathon runner Abdi Nageeye are using a new tool they hope will boost their medal chances this summer: tiny monitors that attach to the skin to track blood glucose levels.

Continuous glucose monitors or CGMs were developed for use by diabetes patients but their makers, led by Abbott ABT.N and Dexcom DXCM.O, also spy opportunities in sports and wellness.

The Paris Olympics, which start on July 26, are an opportunity to showcase the technology - even though there is as yet no proof it can boost athletic performance.

"I do see a day where CGM is certainly going to be used outside of diabetes in a big way," said Dexcom's Chief Operating Officer Jacob Leach.

Diabetes patients remain the CGM specialist's commercial focus, he told Reuters, but Dexcom is also working with researchers on future use to optimise athletic performance. He would not disclose details.

The CGM market is already worth billions of dollars thanks to demand from diabetes patients, who use the coin-sized adhesive skin patches with a Bluetooth link to a smartphone instead of drawing blood through a finger stick. The readings help determine whether they need an insulin dose.

In March, Dexcom's Stelo device, targeting people with early-stage diabetes who are not on insulin, became the first CGM to win U.S. approval for purchase without a prescription. Launch is planned for this summer.

Abbott introduced a CGM product for amateur and elite sports users without diabetes in Europe as early as 2020 and has sponsored Kenyan marathon great Eliud Kipchoge and his team since 2021. Top athletes and their support staff have been using CGMs to optimise calorie intake and workout intensity as they prepare for sport events.

Abbott said it is targeting the non-diabetic consumer market.

On Monday it wonU.S. approval for its prescription-freeLingo device and smartphone app for health and wellbeing, available in Britain since January at a cost of 120-150 pounds ($152-$190) per month.

Also on Monday, Abbott won U.S. clearance for its non-prescription systemLibre Rio for people with diabetes who do not need insulin, to compete with Dexcom'sStelo.

Sales of Abbott's FreeStyle Libre range, the most commonly used CGMs, rose 23% to $5.3 billion in 2023 on demand from diabetes patients who value their ease of use and monitoring precision. Dexcom saw 2023 revenue grow 24% to $3.6 billion.

Research firm GlobalData forecasts the lifestyle CGM market could grow nearly 15% a year to reach $9.9 billion by 2031, partly driven by users of weight-loss drugs like Wegovy who seek med-tech gadgets to support dieting efforts.

Other market researchers estimate the overall CGM market including diabetic use, with suppliers like Medtronic MDT.N, will grow 9-10% annually over five years.


Dutch marathoner Nageeye, who won silver at the Tokyo Olympics, said he and his coaches are monitoring blood glucose as an indicator of the body's available energy, part of his quest for an "effortless run".

CGM use has guided Nageeye, who has qualified for Paris, to work on sleeping and eating patterns so that he expends a minimum of energy during training.

"That's your energy, actually, that's your fuel. We have to monitor that," said Nageeye. His team has been sponsored by Abbott since April 2021.

Australian swimmer Chelsea Hodges, who won relay gold at the Tokyo Olympics, said CGMs had helped her remedy bouts of extreme exhaustion and dizziness during endurance training by making adjustments to her calorie intake and training times.

She spoke to Reuters while preparing for Paris, but recently ended her swimming career due to hip problems.

While companies see growth potential in the gadgets, sports nutrition scientists see a promising field of research.

"A big guesswork for endurance athletes has always been: am I training hard enough or am I training too hard? It seems with CGMs, we have a better understanding," said Associate Professor Filip Larsen of the Swedish School of Sport and Health Sciences.

Larsen, also chief science officer of sports performance consultancy firm svexa, said the firm has been analysing CGM data collected by several athletes and teams. He said svexa is not sponsored by any CGM maker.

Larsen warned, however, that there was little validated science yet on how to optimise an athlete's routines using CGMs.

"Most researchers cannot give you the exact answers. In five years, we will know 10 times as much as we do now."

But the field is abuzz with trials and experiments, including work on glucose-measuring contact lenses.

Sports dietician Greg Cox, associate professor at Australia's Bond University, has worked with swimmers including Hodges and rowers, triathletes and track athletes.

Results of a trial run by his team to test how not eating enough calories to sustain the intensity of exercise would affect endurance athletes' glucose readings have so far been inconclusive, and he said more research into CGMs was needed.

Both Cox and Larsen expressed scepticism about non-diabetic consumers using the technology for health and fitness without professional advice.

"What I see on social media is that normal, healthy people get scared when they had one banana and their blood glucose goes up really high for one hour. This is completely expected and a normal response," said Larsen.

Market leader Abbott told Reuters that understanding blood-glucose swings is key to managing one's metabolism for a healthier life.

"While glucose spikes are normal in healthy people, we also know that having fewer frequent and large spikes and crashes in glucose is associated with improved energy, mood, focus, sleep, and reduces cravings," a spokesperson said.

($1 = 0.7863 pounds)

FACTBOX-Why are top athletes using diabetes tech in pursuit of medals? nL5N3GZ6YV

Additional reporting by Sriparna Roy in Bengaluru and Patricia Weiss in Frankfurt; Editing by Josephine Mason and Catherine Evans


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