Why strength training is non-negotiable.

Strength tracks how long people live

One of the clearest findings in this whole field is one most people have never heard. A meta-analysis of roughly 1.9 million adults found that people with higher grip strength had about a 31% lower risk of dying from any cause than people with lower grip strength. The effect was slightly stronger in women than in men.

Grip strength is a stand-in for whole-body strength — easy to measure, which is why so much data on it exists. The point isn’t the grip itself. The point is that the strength of your muscles tracks something real about how well your body holds up over time.

A separate body of research — looking at resistance training as an intervention rather than just measuring strength — finds that people who do any amount of resistance training have about a 15% lower risk of dying from any cause, with similar reductions in cardiovascular and cancer mortality. The biggest benefit shows up at around 60 minutes a week. More than that doesn’t add much, at least not for health.

These are associations from large studies. They don’t mean lifting guarantees a long life or that not lifting causes a short one. Plenty of factors affect how long people live. But the signal is consistent and big enough that ignoring it would be strange.

Muscle is your blood-sugar sponge

Every meal you eat raises your blood sugar. Your body has to put that sugar somewhere. About 75 to 80 percent of the sugar you absorb after a meal — when insulin is doing its job — gets stored in your skeletal muscle. Muscle is, by a wide margin, the biggest place your body parks blood sugar.

Think of it like a sponge. Every meal dumps sugar into your bloodstream, and muscle is the sponge that mops it up. The bigger and more responsive the sponge, the better it can do its job.

Two things to be honest about, before going further. Type 2 diabetes is not caused by a single thing. Family history matters. Genetics matter. Age, ethnicity, certain medications, and conditions like PCOS all play a role. Some people develop type 2 diabetes despite doing everything “right,” and some don’t despite doing very little. So when I say strength training helps, I mean it’s one important lever — not the only one, and not a guarantee.

The other thing: the strongest evidence we have for prevention — the Diabetes Prevention Program, an NIH trial in the 1990s — was a study of adults already at high risk for type 2 diabetes. In that specific group, a lifestyle program (modest weight loss, regular activity, and ongoing coaching support) reduced diabetes incidence by 58% over the trial. Twenty-two years later, the lifestyle group was still 25% less likelyto have developed diabetes than the placebo group. That’s a real effect. It’s also a finding in a specific population, not a promise for everyone.

What I take from this is simpler than the headlines: building and using muscle is one of the best things you can do for your metabolic health. It doesn’t override your genetics. It doesn’t replace medical care if you’ve been diagnosed with anything. But it consistently moves the needle in the right direction, and it’s something you can actually do.

Strength, bones, and growing older

The thing strength training is buying you, the further out you look, isn’t a beach body. It’s the ability to carry your own groceries, get up off the floor without thinking about it, and not need someone else to do daily tasks for you when you’re 80.

Bones are part of the same story. Resistance training in postmenopausal women increases bone mineral density in the spine and hip by about 1 to 3 percent on average. That sounds small. The right comparison isn’t to nothing — it’s to the natural decline curve, which trends downward starting in your 40s.

Bones are like a bank account. You make deposits through your 30s, then start drawing from it. Resistance training keeps deposits going long past the age when your body would otherwise just be making withdrawals. As with the metabolic story, this isn’t the only factor — hormones, nutrition, and genetics matter too — but it’s one of the few you have direct control over.

Three myths I want to dismantle

“Lifting will make me bulky.” Female testosterone runs about a fifteenth of male levels. Studies comparing how men and women respond to the same strength program consistently find that women build proportional strength and muscle, but the absolute outcome is muscle tone and definition, not bulk. The picture you have in your head when you think “bulky” reflects either a lot of training time, a specific competitive context, or both. Two sessions a week won’t produce it.

“Cardio is enough.” They do different things. Aerobic exercise trains your heart and lungs. Resistance training builds muscle, bone, and the structural reserve that prevents falls later. The data shows that combining the two reduces all-cause mortality more than either does alone. Most people skip the strength side because they’ve been told cardio covers it. It doesn’t.

“Lifting is dangerous, especially as you get older.” The evidence base for resistance training in older adults — including those with osteoporosis, sarcopenia, and chronic conditions — is large and broadly positive on safety, when programmed appropriately. The actual risk for most older adults is the opposite: muscle loss and falls are leading causes of losing independence later in life. If you’re starting later or have a condition that might affect what’s safe for you, get cleared by your doctor and ideally start with someone who can watch your form. Then start.

What “enough” actually looks like

The American College of Sports Medicine’s 2026 Resistance Training Guidelines — the first major update in 17 years — make a point that’s easy to miss. The biggest gain in the data isn’t from optimizing your training program. It’s from going from none to any.

The validated minimum effective dose, plain version:

• Two sessions a week, on non-consecutive days.
• Eight to ten exercises that cover the major muscle groups.
• One set of 8 to 12 reps each.
• About 30 minutes per session. An hour a week, total.

That’s the floor. Most people I meet are nowhere near it. People who train more aren’t getting more health benefit past that point — they’re training for performance, or because they enjoy it (which is fine), or because the fitness industry sold them on more being better (which it isn’t, for health). You probably need less than you think — and you definitely need more than zero.

One last thing

The hardest part of strength training isn’t the program. It’s doing it on the day you don’t feel like it, and the day after that, and the week you’re sick of it, for long enough that it stops being a thing you’re forcing and starts being a thing you’re just doing. That’s where I think coaching actually earns its keep — not in writing the program, but in being the person who notices when you’ve gone quiet and asks why.

If that part is what’s been missing for you, that’s the part I do.