Who is Meghan Hayden? Meet ex-Yankees star Alex Rodriguez’s new fitness coach girlfriendThe couple were first seen together at Michael Rubin’s White Party in early July, just months after A-Rod split from fitness guru Jaclyn CordeiroFormer New York Yankees star Alex Rodriguez has made his relationship with new girlfriend Meghan Hayden Instagram-official.Hayden, a fitness coach, celebrated Rodriguez’s 51st birthday on Monday by sharing couple photos on her Instagram Story and writing, “Happy Birthday @Arod”, with two red heart emojis. Rodriguez reposted the story on his account.The pair were first spotted together at Michael Rubin’s star-studded White Party in the Hamptons in early July. News of Rodriguez’s new flame comes only a few months after he split from fitness entrepreneur Jaclyn Cordeiro after three years together.So who is A-Rod’s new girlfriend, Meghan Hayden? Read on to find out.What is Meghan Hayden’s background?Meghan Hayden has her own training platform, Take Off With Meg. Photo: @meghan_hayden_/InstagramMeghan Hayden, 33, is a fitness coach who graduated from the University of Miami with a bachelor’s degree in exercise physiology. Before that, Hayden studied business and psychology for about a year at the University of Richmond, where she played Division One football, according to her LinkedIn profile.Hayden founded her own strength-and-conditioning training platform, Take Off With Meg. According to her bio on the platform’s website, “she’s most likely biking to her next session or modelling on set with household brands like Under Armour & Athleta” when she isn’t training clients.She is an entrepreneurMeghan Hayden co-founded dating app ATeam. Photo: @meghan_hayden_/Instagram