Your Grip Strength Predicts Your Heart Attack Risk. Here’s How to Test It Today.
Last week we started this series with VO2 max — the single metric research most consistently links to how long you’ll live. If you missed it, it’s in the archive and worth your time.
This week we go somewhere most people don’t expect.
Not to a lab. Not to a treadmill. Not to a blood draw.
To your hand.
The Claim That Sounds Almost Absurd
How hard you can squeeze your hand predicts your risk of cardiovascular disease, cognitive decline, fall injury, surgical outcomes, hospital readmission, and all-cause mortality.
I know how that sounds. It sounds like the kind of claim you’d find on a supplement bottle, not in a peer-reviewed journal. But the research behind grip strength as a longevity marker is among the most robust in the field — replicated across populations, age groups, and countries.
The landmark study is a 2015 paper published in The Lancet — one of the most respected medical journals in the world. Researchers led by Dr. Darryl Leong studied nearly 140,000 adults across 17 countries over four years. Their finding: grip strength was a stronger predictor of cardiovascular mortality than systolic blood pressure. Let that land for a moment. The squeeze of your hand outperformed blood pressure — a metric your doctor measures at every single visit — as a predictor of heart disease death.
That study alone changed how many clinicians and researchers think about grip strength. It is not a curiosity. It is a biomarker.
What Grip Strength Actually Measures
Here’s the key insight: grip strength is not really about your hand.
It is a proxy for your overall musculoskeletal health and systemic vitality. The muscles of the forearm and hand are the measurement site, but what the reading reflects is the general state of your entire muscular system — including the muscle mass you’re carrying, the neural drive behind it, and the metabolic health supporting it.
If you read the first post in this series, you will remember that I was inspired by reading Andy Weir’s books about space travel and the constant need to monitor life support systems. Here’s this week’s analogy: In Project Hail Mary, Ryland Grace can’t directly measure the energy output of the microscopic organism that’s both powering his ship and threatening Earth’s sun. So he measures something else — the temperature of his ship’s hull. A downstream indicator. A number that reflects the health of something too complex to measure head-on. Grip strength works the same way. You’re not measuring your cardiovascular system, your muscle mass, or your metabolic reserve directly. You’re measuring the downstream signal that reflects all of them at once.
When grip strength declines, it almost always declines in parallel with overall muscle loss — the sarcopenia process we’ve been discussing throughout this series. Muscle doesn’t disappear from one place while staying strong everywhere else. It fades systemically. And the hand, as the endpoint of a long kinetic chain, registers that fade early and reliably.
This is why grip strength predicts so much. It’s not that your hand health drives cardiovascular risk. It’s that a weakening grip is one of the earliest measurable signals that your body’s structural and metabolic foundation is eroding.
What Low Grip Strength Predicts
The research is specific enough to be sobering. Low grip strength has been associated with:
Cardiovascular events — The Lancet study found that each 5 kg decrease in grip strength was associated with a 17% increased risk of cardiovascular death and a 9% increased risk of stroke.
Cognitive decline — Multiple studies have found associations between lower grip strength and increased risk of dementia and cognitive impairment. The connection appears to run through both vascular health and overall muscle-brain signaling pathways.
Fall risk and fracture — Grip strength is one of the strongest predictors of fall risk in older adults, and falls remain a leading cause of serious injury and mortality after 65.
Surgical outcomes — Low preoperative grip strength predicts longer hospital stays, more complications, and higher mortality after major surgery. Some surgical teams now screen grip strength as a standard part of pre-surgical assessment.
Recovery from illness — Low grip strength at hospital admission predicts slower recovery and higher risk of readmission across a range of conditions.
None of these associations are incidental. They reflect what grip strength is actually measuring — the state of your body’s structural reserve.
What a Good Number Looks Like
Grip strength is measured in kilograms using a hand dynamometer. Here are general reference ranges based on published normative data:
Men
50–59: Above 44 kg is good; above 50 is excellent; below 35 is low
60–69: Above 40 kg is good; above 46 is excellent; below 30 is low
70+: Above 35 kg is good; above 41 is excellent; below 26 is low
Women
50–59: Above 27 kg is good; above 32 is excellent; below 20 is low
60–69: Above 25 kg is good; above 30 is excellent; below 18 is low
70+: Above 22 kg is good; above 26 is excellent; below 15 is low
These are population-based reference points, not finish lines. Your goal is to know your number, establish a baseline, and track it over time.
How to Test It
Dynamometer — The Standard A handheld grip dynamometer is the clinical tool of choice. Many gyms have one — ask at the front desk. Some pharmacies carry them. You can also purchase a basic model online for $20 to $40. Squeeze as hard as you can with your dominant hand, arm at your side, elbow slightly bent. Take three readings and average them.
The Dead Hang — A Functional Alternative If you don’t have access to a dynamometer, hang from a pull-up bar with both hands and time how long you can hold it. This isn’t a clinical measurement, but it’s a meaningful functional test of grip endurance and upper body pulling strength. Under 30 seconds at any age over 50 is worth paying attention to.
Jar Lid Test — A Rough Indicator If you’re regularly struggling to open jars, lids, or bottles that you previously opened without effort — your grip strength has declined meaningfully. This isn’t a number, but it’s a signal you shouldn’t ignore.
My recommendation: find a dynamometer this week — your gym almost certainly has one — and get your baseline reading. Record it with today’s date.
What Moves the Number
Grip strength responds to the same training stimulus that drives everything else in this series: progressive resistance training.
Pulling movements are the most direct path — rows, lat pulldowns, deadlifts, and their variations all load the grip heavily as part of the movement. Day 3 of the four-day program (Upper B, pull focus) is built around exactly these exercises. If you’re doing bent-over rows, lat pulldowns, and seated cable rows with appropriate load and progression, you are training your grip as a direct consequence.
Beyond that, three tools are particularly effective for targeted grip development:
Carries — Farmer’s carries (walking while holding heavy dumbbells or kettlebells at your sides) load the grip for sustained duration and are among the most functional grip-training movements available.
Dead hangs — Hanging from a pull-up bar for time builds grip endurance specifically. Start with whatever you can hold and add seconds each week.
Fat grip training — Wrapping a towel around a dumbbell or barbell handle increases the diameter and dramatically increases grip recruitment. A simple technique with an outsized effect.
My Number
I tested my grip strength on the dynamometer at my gym. My dominant hand averaged 38 kg across three attempts — in the good range for my age group, but with room to move. The pull-focus day in my current program is doing exactly what it should. I’ll retest in eight weeks.
This Week’s Action
Find a dynamometer — your gym, a pharmacy, or order one online. Test your dominant hand three times and average the results. Write it down with today’s date. If you want a functional baseline as well, hang from a pull-up bar and time it.
Know your number. Then give it something to respond to.
Next Post 3 of The Numbers Don’t Lie. We go inside your nervous system — to a metric your fitness tracker may already be measuring every night while you sleep. It tells you whether your body is ready to train hard or needs to recover. Most people have no idea it’s there.
Marty — VirtaFitness® NASM Certified Personal Trainer | Senior Fitness Specialist
Sources
Leong, D.P., et al. Prognostic value of grip strength: findings from the Prospective Urban Rural Epidemiology (PURE) study. The Lancet, 2015. https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(14)62000-6/abstract
Sayer, A.A., & Cooper, R. Grip strength and muscle mass as markers of sarcopenia and predictors of age-related outcomes. Journal of Cachexia, Sarcopenia and Muscle, 2022.
Bohannon, R.W. Grip Strength: An Indispensable Biomarker For Older Adults. Clinical Interventions in Aging, 2019. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6739073/
McGrath, R., et al. Handgrip Strength Is Associated with Cognitive Function and Dementia Risk. American Journal of Preventive Medicine, 2020.
American Society of Hand Therapists. Normative grip strength data by age and sex.
