Remember Ryan Hall?
As America's fastest marathoner with a personal best of 2:04:58, and also the first American to complete a half marathon in under an hour (59:43), he was poised to dominate the sport for many years to come.
Yet, surprisingly, he announced his retirement just over a year ago (January 2016), citing declining performance and the sport's negative effect on his body.
More specifically, he talked about his chronically low testosterone (or "Low T"), and how it played a critical role in his decision to retire from racing at the age of just 33.
He attributed severe fatigue and his longstanding performance plateau to low T ... and rightfully so.
Testosterone very strongly correlates with athletic performance (which is why anabolic steroid use is so ubiquitous among professional athletes of all types ... anabolic steroids are synthetic "analogs" of testosterone), and even small dips in testosterone can negatively affect performance.
You see, the significance of Ryan's story transcends mere sports trivia ... properly considered, it should compel all male endurance athletes, particularly those over 30 who want to remain healthy and competitive for many years to come, to have an action plan in place for insuring against sport- and age-related testosterone deficiency.
So, with that goal in mind (developing an action plan), let's dive a little deeper into exactly how Low T impairs your performance, the likelihood that YOU are being affected by it right now (the odds will surprise you), and what you can do to correct it.