Don't miss this episode as physiologist and author Gerald Zavorsky joins us to review his publication, "Declines in Marathon Performance: Sex Differences in Elite and Recreational Athletes".Dr. Zavorsky reviews the physiological reasons runners naturally slow down as they age and highlights his research comparing elite athletes to 'average' runners. He emphasizes the need for strength training to maintain and build muscle mass at age 35+. If you are looking for an explanation of VO2max, maximum heart rate, and other scientific aspects related to running after 35+, this episode will be for you. Additionally, understanding the reasons why runners slow down with age and the role gender plays in that decline is fundamental to runners after the age of 40.Find Gerald Zavorsky on LinkedIn, Twitter, or Instagram.Be sure to visit https://runningwithgrit.com for all things related to running after age 40 and the complete show notes at this link!