yaya2017
Prof. Member
Geregistreerd op: 16 Okt 2018
Berichten: 533
|
 Geplaatst: 16-11-2018 08:11:28 Onderwerp: able-bodied athletes to run at the same speeds. |
 |
|
Your first instinct might be to rush out and buy a pair – especially as a separate study in the Nike Air Max 2017 Femme journal Sports Medicine on elite athletes estimated that the shoes could take six minutes off a three-hour marathoner’s time. Good luck with that. The shoes appear to be almost permanently www.daviddenardi.fr sold out, and often go for double their retail price on eBay.A more pressing task is to ask whether the shoes Nike Air Pegasus 83 Donne – and other forms of cutting-edge technology – go too far. Do they, in effect, turn what is supposed to be a level playing field in one that more resembles the slope of the Eiger?A case can be made that the Vaporflys have already created at least one major sliding-doors moment in elite sport. Roger Pielke Jnr, the director of the sports governance centre at the University of Colorado Boulder, notes that in the 2016 US Olympic marathon trials, Kara Goucher Adidas Superstar Mujer finished in fourth – missing out on the plane to Rio by just one place. Yet the winner, Amy Cragg, along with the third-placed runner, Shalane Flanagan, were both wearing early prototypes of the Vaporflys, which he believes could have made all the difference to the result.“It is Nike Air Zoom Spiridon Femme highly likely that Goucher is the first known athlete to miss the Olympics due to shoe technology,” says Pielke. “The mean improvement of Nike Vaporfly for women and fastest runners is around 2%.
Put Goucher into Vaporflys in the 2016 US marathon trials, and she gets a spot if they improve her performance by only 0.7%.”The kicker? If Goucher had not left the Nike Oregon Project after raising concerns about its use of TUEs and thyroid medication, she may indeed have been wearing those shoes.The International Association of Athletics Federations, the world Nike Air Max 95 Mujer governing body, also insists that Nike’s game-changing shoe meets all its requirements and “does not require any special inspection or Nike Air Vapormax Damen approval”. Yet elite competition also requires Nike Air Max 90 Femme Noir a semblance of fairness. At some point the IAAF will have to rule on the permissible amount of energy Nike Roshe Run Femme return allowed from cushioning materials and whether carbon?fibre devices in midsoles should be banned.
Such discussions stretch beyond track and field. In 2009, the sports governing body of swimming, Fina, banned the LZR Racer swimsuit because it was said to reduce skin friction drag by 24%. Yet in other sports the rules appear a little looser. Take British Cycling’s skinsuits, which they have used at Olympic Games since 2008 and are said to improve performance by up to Nike Air Max 90 Hombre 7%. That is a colossal advantage – yet the UCI has ruled they are legal.Those www.thomaspolly.fr/ suits will, crucially, contain near-invisible “trips” that disrupt the flow of air and create a turbulence effect that reduces the amount of wind resistance acting on the body.All this can Nike Air VaporMax Femme get Nike Air Max 90 Mujer Negras very thorny. At London 2012, most supported the Paralympian Oscar Pistorius being allowed to race Nike Air Presto Mujer wearing carbon fibre limbs – even though respected sports scientists, such as Ross Tucker, were pointing out that it enabled him to use 20% less force than able-bodied athletes to run at the same speeds.When I spoke to someone who uses the Vaporfly Elites they raved about them providing more “bounce and forward momentum” and said they also helped them go faster for longer. “Oddly you feel them most when standing still or walking in them,” they said. “ |
|
FAQ
Zoeken
Gebruikerslijst
Gebruikersgroepen
Registreren
Profiel
Log in om je privéberichten te bekijken
Inloggen
