Your Friday Daily News Digest

by Mark Zalewski

August 5, 2016

In Friday’s CyclingTips Daily News Digest: Morton repeats Utah stage win a year later; Gonçalves impresses in Portugal sprint; Van Poppel doubles wins in Burgos; Why the Tour of California’s move to WorldTour could be bad for US cycling; ‘Dream signing’ Michael Matthews confirmed by Giant-Alpecin; Preview: What you need to know about the men’s road race at the Rio Olympics; Dennis crashes on Rio course recon; Roche: A fourth Tour win for Froome will be complicated; Contador testing climbing legs in Burgos attack; AG2R La Mondiale signs Naesen and Vandenbergh for two seasons; Kluge signs with ORICA-BikeExchange; Davis Phinney’s ’84 Olympics bike and the golden dream that almost was; Study: Bicycle laws, infrastructure marginalizes poor; Drink developed for military boosts cycling performance; Five Crazy Moments in Olympic Cycling History; Wiggins set for final Olympic chapter – part two; Queensland state velodrome construction time-lapse

Drink developed for military boosts cycling performance

by CyclingTips

A research study found that a drink using ketones for energy, rather than sugar or fat, helped competitive cyclists ride farther. Ketosis, or production of ketones by the liver, “is a natural response to energy crisis and is of vital importance to us as it allows us to survive ‘insults’ such as starvation and even the first few hours after birth when fuel levels are low,” said lead author Pete J. Cox of the University of Oxford in the UK.

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Researchers found that when ketones are provided in a drink, the body will use them for muscle fuel. As well, ketone-powered workouts resulted in less lactate, a byproduct of breaking down sugar that causes muscle cramps and soreness.

“In some ways, the demands of endurance exercise parallel (albeit more rapidly) the metabolic constraints pertinent to survival in starvation, placing a premium on glucose reserves and effective oxidative respiration,” the authors wrote.

The study had eight athletes fast overnight before completing two bicycle exercise trials of one-hour steady-state cycling, followed by a 30-minute time trial. For one trial, the cyclists drank a carbohydrate drink, and for another they had a drink with carbohydrates and ketones. After the ketone drink, the cyclists traveled an average of 411 meters further in the half-hour time trial than after the carbohydrate drink.

Though not currently available and difficult to produce outside a laboratory setting, a University of Oxford company is developing the ketone fuel to be commercially available later this year and the authors of the study may receive royalties from its sale.

Click through to read more at Reuters.

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