Serena Williams made headlines this week with her return to professional tennis at age 44, entering the doubles draw at the HSBC Championships in London after nearly four years away from the sport. But beyond the fanfare, what does her comeback actually demand of her body?<\/p>\n
Matthew Armstrong, assistant professor in the Department of Exercise Science in the David B. Falk College of Sport, says the cardiovascular realities of competing at 44 are significant\u2014and measurable.<\/p>\n
The most concrete factor, Armstrong explains, is maximum heart rate (HR), which declines approximately 0.7 to 1 beat per minute per year\u2014a rate that holds regardless of sex or training background. Over two-plus decades of a career, that adds up.<\/p>\n
\u201cA 20-year-old would be able to achieve a max HR about 24 BPM higher than a 44-year-old Serena,\u201d Armstrong says. \u201cThat is a large delta that would make a difference.\u201d<\/p>\n
As for the reconditioning process itself, Armstrong says the fundamentals don\u2019t change much at the elite level. \u201cRealistically, the training is the same. It\u2019s just hard work that needs to be done in order to get to a level that you can compete at.\u201d<\/p>\n
One key variable, he notes, is how active Williams remained during her hiatus. \u201cIf she has done very little training during her break then the comeback will be difficult\u2014but if she has been training consistently, even though it would not be to a pro athlete standard, then this would make it easier.\u201d<\/p>\n
Elite athletes do carry certain cardiovascular advantages into later career stages\u2014structural adaptations like enlarged chamber size and increased stroke volume that make the heart more efficient\u2014but those advantages only go so far against the natural decline in aerobic capacity that comes with age.<\/p>\n
With the HSBC Championships beginning June 8, Armstrong says the most fascinating question may be one that only time\u2014and performance data\u2014can answer: whether Williams\u2019 speed, power and endurance on court today match what she brought to the game in the past.<\/p>\n