Nike stirs the pot with ‘gamechanger’ running shoe in step with new rules

• Air Zoom Alphafly Next% falls inside World Athletics rules
• Rival brands are frustrated by Nike’s array of patentsJust days after World Athletics belatedly introduced regulations to limit running shoe technology, Nike has courted further controversy with one that slips inside the rules and then hailing it as another “gamechanger”.The US company confirmed its Air Zoom Alphafly Next% are based on the shoes worn by the Kenyan Eliud Kipchoge when he ran a marathon in u