Right because muscle mass and strength is the same as peak athleticism. That whole article is about strength training to stay healthy as you get old. It has zero to do with athletic performance. Are you kidding me with this shit?
For Athletes' Peak Performance, Age Is Everything
French researchers have found that athletes' peak performance actually follows a rigid physiological law. Generally, most enter their athletic prime somewhere between 20 and 30, before undergoing an "irreversible" decline. (They even pinpoint when chess grandmasters start going over the hill.)
Athletic performance obviously decreases as people get older and their bodies wear down physically, but new data compiled by French researchers sheds new light on exactly when these declines might start showing up, at least in some sporting disciplines.
The careers of more than 1,150 swimmers and track-and-field athletes, as well as the accomplishments of nearly a hundred chess grandmasters, were scrutinized based on the event they were participating in, as well as their age and how old they were when they established any world records. In all, more than 11,200 performances among these athletes made it into the data set, and the results confirm that there reaches an age – a physiological tipping point, if you will – when athletes start to experience an irreversible downturn in their abilities.
Generally speaking, athletes start to see physical declines at age 26, give or take. (This would seem in line with the long-standing notion in baseball that players tend to hit their peak anywhere from ages 27 to 30.) For swimmers, the news is more sobering, as the mean peak age is 21. For chess grandmasters, participating in an activity that relies more than mental acuity and sharpness rather than brute, acquired physicality, the peak age is closer to 31.4.
For setting world records in a given athletic discipline, the mean age is 26.1, so all you sports-minded thirty-somethings hoping to still see your name published in the Guinness Book may have already missed your mark.
https://www.wired.com/2011/07/athletes-peak-age/
The question of when an athlete hits their peak has been much debated for many years because there are examples of elite and amateur competitors enjoying the most successful periods of their careers at each end of the spectrum and everywhere in between.
Knowing when that might be can be useful in developing long-term training strategies.
There are, however, various sources of well-researched data available that points to common points in life when best results are generally achieved.
A review carried out in New Zealand that was published back in 2015, for example, explored a huge amount of estimates about the age at which elite athletes peak, and asserted ages for a number of different disciplines in swimming and athletics.
For sprints, jumps, and throws, men and women hit their peak around 25 years of age while triathletes peak at 27.
The longest endurance events profiled an older age though, with marathoners peaking at 30 and 29 for men and women respectively while Ironman athletes hit their prime even older at 32 and 34.
https://builtforathletes.com/blogs/news/what-age-do-athletes-peak
https://cepar.edu.au/sites/default/files/peak-performance-age-sport.pdf