The Rise of Longevity Fitness

You don’t have to want to live forever (a la the millionaire-immortality-influencer Bryan Johnson) to want to live longer. I’ve seen a larger shift in the fitness industry lately, where a focus on “longevity” has replaced where you might have once seen the words “beach body.” All around us, the language has shifted from “get shredded” to “increase healthspan,” from “tone up” to “build bone density.” In this new era, the goal isn’t just looking good at the beach, but making sure you can still walk on that beach when you’re ninety. 

On its face, this is a welcome change. I’ll always advocate for metrics of success that are less about how you look in a mirror, and more about how well your body functions across decades. At the same time, I’m skeptical of the ways “metabolic flexibility,” “muscle mass preservation,” and “inflammation control” are replacing “beach body” in the wellness lexicon. Is this truly progress in how we think about health? 

Again: A fundamental reimagining of why we exercise is not altogether bad. I’m just not convinced that’s what’s happening here. Is this obsession with longevity actually in good faith? Or are we being sold the same old products and insecurities, now wrapped in shiny new scientifically sounding packaging?

What is the science behind longevity fitness?

Beneath the fresh terminology, much of the longevity fitness advice in my algorithm is pretty familiar. Lift weights, do cardio, eat whole foods, get enough sleep, and manage stress? These are all the same recommendations that have anchored public health guidance for decades.

Going a little deeper, studies do consistently show that muscle mass is one of the strongest predictors of longevity and independence in older age. Cardiovascular fitness is so strongly correlated with lifespan that some researchers have called it the single best predictor of mortality. 

“Instead of optimizing for short-term aesthetics or peak performance, longevity-focused movement optimizes for metabolic health, hormonal stability, and functional strength over time,” says Dr. Katheleen Jordan, chief medical officer at Midi Health, a virtual care clinic focused on women in midlife. “Resistance training preserves muscle mass and bone density, which are critical predictors of fall risk and independence as we age. Muscle mass itself and cardiovascular fitness improves our metabolism and insulin sensitivity.” This matters especially for women, who face specific challenges as they age. Women lose muscle mass faster than men after menopause and are at higher risk for osteoporosis. Plus, the cultural pressure to stay small has historically steered women away from the heavy lifting that could protect their bone density. 

“Fitness used to often be defined by one number on a scale, so it’s exciting to see that we have gone beyond that with a greater understanding that many things define fitness,” Jordan says. In this way, the longevity fitness framework pushes a truly helpful counter-narrative to diet culture, one where strength is more than just aesthetics.

How longevity fitness can be used to rebrand products you don’t need

So, on one hand, a focus on longevity does feel like progress: valuing strength over skinniness and thinking in decades rather than weeks. On the other hand, it’s yet another set of standards to meet, and another source of anxiety about whether you’re doing enough.

“A lot of what’s being marketed as new longevity or biohacking is actually reinforcing long trusted ideas around fitness, but with new language,” Jordan says. This isn’t necessarily nefarious—reframing exercise around long-term health rather than short-term aesthetics is genuinely valuable. But it does raise questions about who benefits from this linguistic shift. Often, it’s the same wellness industrial complex that previously profited from body insecurity, now profiting from aging anxiety. 

In this way, the fitness industry has found a way to rebrand the same old products—like supplements or wearables—along with hawking some new ones, like direct-to-consumer “biological age” tests. But even a seemingly legit “biological age” test won’t really give you any actionable insights into living longer. That company will, however, try to sell you a supplement that you certainly don’t need.

“As with any industry, there are some bad actors and we should be mindful of interventions that promise outsized results,” Jordan says. “Healthspan cannot be hacked quickly or swallowed in one pill.” The interventions proven to have some impact on healthspan—exercise, nutrition, sleep, stress management, not smoking—are decidedly unglamorous.

Myths about longevity fitness

It’s no surprise that the longevity fitness space is rife with oversimplifications and outright myths. Here are some I kept coming across in my research that warrant skepticism:

• The idea that you can “biohack” your way to dramatic life extension. Despite the promises of longevity influencers, there’s no evidence that any supplement, cold plunge protocol, or red light therapy device will add decades to your life. 

• That more data equals better health. Obsessively tracking every health metric can become counterproductive, leading to stress that ironically undermines the benefits of all the healthy behaviors you’re tracking. 

• That longevity fitness can compensate for structural inequality. Your zip code is a better predictor of your lifespan than your VO2 max. Access to healthcare, safe places to exercise, fresh food, and economic security matter enormously. Individual optimization can’t overcome systemic disadvantage.

The pros and cons of the longevity fitness movement

So where does this leave us? The longevity fitness movement contains both genuine progress and, predictably, a lot of repackaged hype. The emphasis on strength, cardiovascular fitness, and metabolic health rests on solid science. And the shift from pure aesthetics to actual health-focused goals is meaningful, particularly for women escaping a lifetime of diet culture. 

But this shift isn’t perfect. In many ways, “healthspan” allows us to talk about the same old snake oil supplements and unattainable beauty standards, just with fancier language. It’s yet another arena for optimization, full of expensive and often unnecessary interventions. 

I recommend a middle ground. Embrace the core insights of longevity fitness—that exercise is about building a resilient, capable body for the long haul—while rejecting the anxiety and consumerism that often accompany it. Because in the end, what’s the point of extending your healthspan if you spend all those extra healthy years anxiously monitoring whether you’re doing it right?