Middle age is when your age starts to show around your middle. Bob Hope
I knew I wasn't alone in feeling inexplicably tired after doing things that used to feel easy — that vague sense that my body had become a slightly less cooperative version of itself. No sharp pains, no dramatic symptoms, but noticeable enough to give me pause. And I kept hearing the same chorus from everyone around me: welcome to midlife. Honestly, I don't have a problem with the body aging. I'd be the first to say we should embrace our changing bodyscape.
But apparently, it doesn't have to be quite like this. From what I've been reading, it's possible to embrace midlife and vitality at the same time. I've spent the last few weeks going down a rabbit hole on sarcopenia, the age-related loss of muscle mass, which a lot of experts are now calling the most important thing happening to our bodies in midlife that almost nobody is talking about. Here’s the unsettling part: if we're not actively doing something to combat it, we lose ground every single year.
Why bother with muscle?
Starting around our mid-thirties, the human body begins to lose muscle mass at roughly 3-5% per decade. By our 60s, if we don’t intervene, we could lose 10-20% of the muscles we had in our prime. And, by age 80, according to studies, the average person has lost up to 30 percent.
Keeping muscles up is not about vanity in a swimsuit, or about looking like Schwarzenegger or Serena Williams. As one of the most metabolically important tissues in our bodies, our muscles regulate blood sugar and support our joints. But most importantly, they are the primary site where our bodies burn fuel, which explains why, as muscle mass declines, metabolism slows, fat accumulates more easily, and energy levels drop.
Also, there is a strong correlation between muscle maintenance and longevity. A study of nearly 2 million participants found that low muscle mass was a stronger predictor of mortality risk than obesity.
Cardio Isn't Enough
As someone with a deep and complicated relationship with running, I hate to say this, but pure cardio doesn’t cut it for maintaining muscle mass.
Cardiovascular exercise is genuinely wonderful. It is good for our heart, mood, brain, sleep, and about a dozen other things. But it does not build muscle. And in midlife, when muscle mass is quietly eroding, "I walk 3 miles every morning" or "I do yoga three times a week", while amazing, is not doing the work that needs doing.
The only stimulus that meaningfully reverses sarcopenia is resistance training. Lifting weights. Pushing against something heavy enough that our muscles have to adapt.
There's no clever nutritional workaround, no supplement that replicates it, and according to many experts, Pilates or yoga cannot quite produce the same outcome.
I know this can sound overwhelming and intimidating. But here’s what gave me hope.
It’s never too late to start
A landmark study in the New England Journal of Medicine followed nursing home residents (average age 87) through a 10-week resistance-training program. They gained significant muscle strength. At 87. In a nursing home.
Muscle loss is one of the few genuinely reversible aspects of physical aging. According to scientists, with the right stimulus, our bodies can build it at any age.
So how do we get started?
I know. The gym is intimidating, and most of us have no desire to compete with twenty-five-year-olds taking mirror selfies of their toned abs.
But more importantly, who among us has the time to fit one more thing into our busy days?
Here is the genuinely good news: the dose required to meaningfully reverse muscle loss in midlife is not the grueling, five-days-a-week, protein-shake-every-two-hours regimen. According to research, two 30-45-minute sessions of resistance training per week are sufficient to produce significant gains in muscle mass and strength, even for people starting in their 50s and 60s.
And no need for an expensive gym membership. Bodyweight exercises, resistance bands, or simple home workout equipment like dumbbells and kettlebells are more than sufficient.
There’s just one nutritional variable worth paying attention to, and it's not as complicated as the wellness industry would like us to believe. We need to up our protein intake. The recommendation is to have about 0.7 grams of protein per pound of bodyweight. So, roughly 105 grams of protein for a 150-lb person. There’s no need for obsessive tracking or turning our meals into science projects. Simply moving away from a carb-heavy diet to a more balanced one should suffice.
1.5 hours a week seems like a reasonable investment to beat lethargy and lower the risk of sarcopenia. So maybe instead of asking the internet for the next Netflix show recommendation, we should be asking for a tailored strength-training plan.