Why Strength Is the Vital Sign Your Doctor Never Measures

Why Strength Is the Vital Sign Your Doctor Never Measures

At a routine physical, a doctor charts blood pressure, weight, cholesterol, and triglycerides — a page of numbers meant to forecast the years ahead. None of them measure how strong you are. That's a strange omission, because muscle strength is one of the most reliable predictors of both lifespan and healthspan that researchers have found — in some studies, a better predictor than the blood-pressure reading sitting right next to it on the chart. This episode of Build for Health, with host Pete Wright and ELEV8 strength coach Srdjan Injac, examines the gap between what the exam room measures and what actually keeps a body running — and why that gap exists in the first place. The trail starts in medical training itself. Across four years of U.S. medical school, students receive on average roughly nineteen hours of nutrition education — under one percent of total instruction — and most of that is biochemistry, not how to counsel a patient on what to eat for breakfast. The result isn't ignorant doctors; it's a system built to diagnose and treat disease rather than prevent it, and one that gives a clinician about eight minutes per visit to do it. From there the episode turns to what the research actually rewards: grip strength, leg strength, walking speed, and total muscle mass — each of which tracks with how long and how independently people live. Low muscle mass even has a clinical name, sarcopenia, and a real cost, from falls and fractures to the loss of being able to stand up unassisted. The throughline is that strength isn't cosmetic. It's infrastructure. Underneath the specifics is a harder question about who owns prevention. When a visit is built around treating the number — a statin for cholesterol, a pill for blood pressure, another for blood sugar — the lifestyle changes that move the underlying condition can go unmentioned. Type 2 diabetes is the sharpest example: in clinical trials, substantial weight loss has put nearly half of shorter-duration cases into remission. The takeaway isn't that medicine is the enemy, and it certainly isn't that anyone should stop a prescription on their own. It's that absence of advice is not absence of importance — and that the strongest move a patient can make is to walk into the exam room asking not just how to fix a number, but how to keep it from coming back. KEY TAKEAWAYS * Strength is an unmeasured vital sign. A standard physical records a dozen numbers that predict your health — but not how strong you are, even though strength rivals or beats several of them as a predictor. * Grip strength is a whole-body signal. It correlates with all-cause mortality, cardiovascular disease, and future disability — in large prospective research, more strongly than systolic blood pressure. (The point isn't to train your hands; grip is a proxy for total-body strength and resilience.) * Walking speed predicts survival. Especially after age 65, usual walking pace integrates strength, balance, cardiovascular fitness, and nervous-system function into one accessible measure of vitality. * Leg strength buys independence. The legs hold the largest muscles in the body; maintaining them lowers the risk of falls, fractures, and the loss of everyday autonomy — including the ability to get up off the floor, or off the toilet, without help. * Low muscle mass has a name and a cost. Sarcopenia — age-related loss of muscle — is linked to higher disease and disability risk. You can carry less mass and still be strong, which is why strength, not size, is the goal. * Med school barely covers nutrition. U.S. medical students average ~19 hours of nutrition across four years, under 1% of instruction — and most of it is biochemistry, not practical dietary counseling. The gap is structural, not personal. * Lifestyle can move the underlying condition, not just the number. Resistance training, better nutrition, and weight loss can improve blood pressure, cholesterol, and blood sugar at the source. Type 2 diabetes remission is well-documented in shorter-duration cases following significant weight loss. * Ask prevention questions, not just prescription questions. "How do I keep this from coming back?" is a different conversation than "What do I take for this?" Safety note: Nothing here is medical advice, and no one should start, stop, or change a medication on their own. Decisions about prescriptions — including any wind-down — belong with your own clinician. GLOSSARY * Sarcopenia — Age-related loss of skeletal muscle mass and strength; associated with higher risk of falls, disability, and disease. * Grip strength — Force generated by the hand, typically measured with a hand dynamometer. Used as a low-cost proxy for total-body strength and a research-validated predictor of mortality and disease risk. * Gait speed (walking speed) — Usual walking pace, measured over a short distance. A simple, strong indicator of healthy aging and survival because it draws on multiple body systems at once. * Sarcopenia vs. weakness — You can have less muscle mass but still be strong; the episode stresses that strength and function matter more than size alone. * Type 2 diabetes remission — Return of blood sugar to a non-diabetic range without medication, sustained through lifestyle change. Remission is documented (especially in shorter-duration disease) but is not the same as a permanent cure; it depends on maintaining the habits. * Statin — A class of drugs that lowers cholesterol; cited as an example of treating the number rather than the cause. * Insulin resistance — Reduced response of cells to insulin, a key driver of type 2 diabetes; improved by activity, muscle, and fat loss. * Naturopath / naturopathic medicine — A practitioner approach that, as described in the episode, emphasized longer visits, lifestyle, and prevention. (Scope of practice and licensing vary by state.) LINKS & NOTES * Sawbones: A Marital Tour of Misguided Medicine — Dr. Sydnee McElroy and Justin McElroy's medical-history podcast (Maximum Fun): https://maximumfun.org/podcasts/sawbones/ [https://maximumfun.org/podcasts/sawbones/] * ELEV8 Fitness: https://elev8fitnesspdx.com [https://elev8fitnesspdx.com/] The evidence behind this episode * Nutrition in med school: "The State of Nutrition Education at US Medical Schools," Journal of Biomedical Education, 2015 — https://onlinelibrary.wiley.com/doi/10.1155/2015/357627 [https://onlinelibrary.wiley.com/doi/10.1155/2015/357627] * Grip strength vs. blood pressure as a mortality predictor: Leong et al., PURE study, The Lancet, 2015 — https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(14)62000-6/abstract [https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(14)62000-6/abstract] * Walking speed and survival: Studenski et al., "Gait Speed and Survival in Older Adults," JAMA, 2011 — https://doi.org/10.1001/jama.2010.1923 [https://doi.org/10.1001/jama.2010.1923] * Type 2 diabetes remission via weight loss: Lean et al., DiRECT trial, The Lancet, 2018 — https://pubmed.ncbi.nlm.nih.gov/29221645/ [https://pubmed.ncbi.nlm.nih.gov/29221645/]

Staying Lean on Vacation with Devon Castro

ELEV8 trainer Devon Castro joins hosts Pete Wright and Srdjan Injac to take on a familiar fear: that a vacation will erase a year of training. It doesn't hold up. Muscle is durable: meaningful loss takes weeks of true inactivity, not a long weekend, and the "deflated" look people notice after a few days off is water and glycogen shifting — not muscle disappearing. Cardio fades faster than strength, which is why a swim, a hike, or a morning run protects the fitness that actually slips first. Maintaining doesn't require a real gym, either. A handful of big compound movements or a short bodyweight circuit — roughly twenty minutes, a couple of times a week — is enough to hold muscle, because the largest muscle groups recruit the smaller ones for free. Then there's everything that doesn't look like exercise: walking a new city, stairs, carrying bags. That non-exercise movement adds up to real energy expenditure, and it's often higher on vacation than at a desk. On food, the episode pushes back on a familiar rule — breakfast isn't a metabolic switch that makes or breaks weight, but a protein-forward first meal does a real job on a chaotic travel day: it adds structure and keeps you from arriving at dinner ravenous. Skipping it works fine for some people; what matters is the whole day, not the clock. And sleep turns out to be the quiet anchor under all of it — short sleep nudges you toward more food and worse decisions the next day. Vacation isn't a training phase, and treating it like one is the actual mistake. The goal isn't progress — it's coming home without losing ground and without white-knuckling the whole trip. Move a little, eat with a couple of anchors, protect your sleep, and enjoy the thing you traveled for. KEY TAKEAWAYS * A week or two off costs you almost nothing. Real muscle loss takes weeks of inactivity; "mature" muscle built over years is even more durable. * Feeling "flat" isn't losing muscle. It's water and glycogen shifting, and it bounces back fast once you're eating and moving normally. * Cardio fades faster than strength. If you keep one thing up, make it a swim, hike, or run — that's what slips first. * You don't need equipment or an hour. Three compound movements, or a bodyweight HIIT circuit, ~20 minutes, twice a week, maintains muscle. * Train the big stuff. Large compound movements recruit the smaller muscles automatically — skip the isolation work on the road. * NEAT is real and underrated. All the incidental walking, stairs, and sightseeing is genuine energy expenditure, often higher than your normal desk-bound day. * Breakfast isn't magic for weight. But a protein-forward first meal adds structure and prevents the over-hungry dinner blowout. Skipping is fine for many people; total daily intake is what matters. (Exception: people with blood-sugar regulation issues should eat earlier — confirm framing, see production notes.) * Sleep is the keeper. Poor sleep drives overeating and worse choices — protecting it beats forcing a workout. * Moderation beats restriction. The enemy isn't the gelato; it's the all-or-nothing rebound that turns one treat into a five-day write-off.

GLP-1, Cortisol, and Cycle Syncing: A Women's Strength Training Reality Check with Brooke Passey and Kaila Gallion

Spend ten minutes on the wellness internet and you'll learn that women's health runs on one vengeful hormone, that carbs are a betrayal, and that the fix is a protocol synced to your cycle. The kernel of truth — most fitness research was done on men — keeps getting buried under products, calendars, and miracle drugs. This episode digs for the science underneath. What actually changes when you train a woman instead of a man? Less than you'd think. From there: the real cost of GLP-1 drugs, what fasting and keto quietly do to hormones and energy, whether cycle-syncing is science or a $40 grift, and why cortisol isn't the villain your feed makes it out to be. The throughline is the least marketable advice in fitness: balance beats extremes, and the scale is the wrong thing to track. Every shortcut here sells speed at the expense of the one thing that compounds over a lifetime — the muscle and bone you build the slow way. Key Takeaways * Programming for women and men is more alike than different. Same core exercises; the real variables are intensity and recovery, adjusted to where someone is in their cycle and how they feel day to day. * "Bulky" is largely a myth. Building significant size is genuinely hard and isn't a default risk of lifting heavy. * GLP-1 medications carry an off-label cost. Roughly a quarter of the weight lost can be muscle, and falling estrogen accelerates bone loss — a setup for osteopenia and, later, osteoporosis. * The drugs are legitimately useful for real medical need, but become a problem when used as a permanent shortcut with no nutrition education and no training to protect muscle. * Fasting and keto trade fast scale drops for thyroid suppression, disrupted estrogen, irregular or missing periods, and lower energy — and the effects hit lean, active women hardest. * Carbs aren't the enemy. A floor of about 150g per day supports estrogen and thyroid function; too little for too long reads to the body as a famine signal. * Cycle phases are real, but cycle-syncing products oversell them. Strength tends to peak in the follicular-to-ovulatory window; the luteal phase brings fatigue, cravings, bloating, and water retention. The answer is personalization and adapting effort — not quitting the gym. * Cortisol is essential, not evil. It regulates energy, blood sugar, and the sleep-wake cycle. Chronic elevation is the issue, and even then it works through behavior (cravings, poor sleep, low recovery) rather than directly causing fat gain. * The scale lies daily. Two-to-five-pound swings in 24 hours are normal and almost never fat. Track body composition and performance instead. * The shortcut is the trap. Medications, extreme diets, and trend protocols sell speed; muscle and bone are built slowly and pay off for the rest of your life. Liked what you heard? Srdjan, Brooke, and Kaila are all coaches at ELEV8 Fitness — and you can train with them in real life, not just in your earbuds. No shortcuts, no $40 cycle calendars. Just real programming built for your body and your life. Start at elev8fitnesspdx.com [https://elev8fitnesspdx.com/].

Your Bones Are Alive

Most people picture the skeleton as a rigid frame — inert scaffolding that holds everything else up. It isn't. Bone is living tissue, constantly broken down and rebuilt, and it responds to stress exactly the way muscle does: load it, and it grows stronger and denser. That one fact changes the whole question. Bone health isn't something you're stuck with — it's something you build, and the same training that builds muscle is reinforcing the skeleton underneath it. The rebuilding runs on a process called remodeling: specialized cells called osteoclasts clear away old, damaged bone while osteoblasts lay down new tissue. Peak bone mass arrives in the late twenties to early thirties, and from there it's a slow decline — faster for anyone inactive, under-eating, or skipping resistance work. The most effective defense is loading bone on purpose. Strength training pulls on bone and signals it to densify, and it builds the balance and stability that prevent the falls that fracture weak bone in the first place. Plyometrics — jumping, hopping, the explosive movements most people skip — add the dynamic, high-impact load that bone responds to best, especially in the hips and lower body where osteoporotic fractures tend to happen. And these habits compound, so the work done in your twenties, thirties, and forties sets your fracture risk decades later. Movement only pays off if the raw materials are there, and strong bone is a team effort. Calcium is the building mineral, but it needs vitamin D to be absorbed, magnesium to keep its balance, and vitamin K to direct it into bone rather than into blood vessels. Protein matters more than most people assume — bone isn't pure mineral, it's built on a protein matrix, largely collagen, that gives it flexibility and structure (and collagen isn't just for women). Chronic under-eating and crash dieting starve that whole system. Sitting on top of all of it are the hormones: estrogen slows bone breakdown in both sexes, which is why loss accelerates after menopause; testosterone supports bone-building; and chronically elevated cortisol — from stress, poor sleep, or long-term steroids — tips the balance toward loss. That interconnection is what makes the GLP-1 question more complicated than the marketing suggests. The medications aren't villains — for the right person they're a genuine tool. But rapid weight loss strips muscle along with fat, and appetite suppression can drop protein and nutrient intake too low to maintain bone. Push the first domino — the number on the scale — and muscle, bone, and recovery fall behind it. Current research ties the bone concern more to that muscle loss and reduced loading than to any direct effect of the drug, and it points back to the same protections that build bone in the first place: enough protein, calcium, and vitamin D, plus resistance training. Which is the reassuring part — bones are more in your control than they feel. Ask for bone-density and hormone markers at the next blood draw, train with load and impact, eat enough protein, and start early, because this is a skeleton you build over decades, not weeks. No adamantium required. KEY TAKEAWAYS * Bones are living tissue, not a static frame. They constantly remodel — osteoclasts break down old bone, osteoblasts build new — and they respond to load just like muscle does. * Use it or lose it. Peak bone mass arrives in your late twenties to early thirties; after that it declines, faster if you're inactive, under-eating, or skipping resistance training. * Muscle and bone are directly linked. Building muscle pulls on bone and helps maintain density — so strength training does double duty. * Plyometrics matter and get ignored. Jumping, hopping, and explosive movement load the hips and lower body where fractures happen. Start early; they get harder to begin later. * Bone nutrition is a team. Calcium needs vitamin D to absorb, magnesium and vitamin K to be directed properly, and protein/collagen to maintain the bone's structural matrix. Collagen isn't just for women. * Hormones set the balance. Estrogen (in both sexes), testosterone, and cortisol all influence whether you're building bone or losing it — which is why bone loss accelerates after menopause and with chronically high stress. * GLP-1s deserve nuance. Useful for the right patient, but rapid weight loss can cost muscle and bone, especially if protein and training fall off. Current research links the concern to muscle loss and reduced loading more than to a direct drug effect — and resistance training plus adequate protein, calcium, and vitamin D are the recognized protections. * It's a domino chain. People focus on the first domino (the number on the scale) and miss everything connected behind it. Looking skinnier isn't the same as getting healthier. Links & Notes * Submit your questions to the show! [https://coda.io/form/Ask-The-Trainer-Questions-for-Build-For-Health_dQ_Ip5RWkKF]

Throw the Scale Away

t starts with one of the most common questions Srdjan gets at the gym: "What should I weigh?" A client asked it that very morning — wanting one number, for her height, that would mean she was healthy. But that number doesn't exist, and chasing it might be the thing holding people back. Healthy weight isn't a point on a scale; it's a range where your body functions, recovers, and performs well. From there, Pete and Srdjan take apart the whole toolkit we've been handed. The bathroom scale tells you nothing about muscle, metabolism, or health — two people at the same weight can be worlds apart inside, which is how "skinny fat" happens. BMI is worse: Pete traces its strange pedigree from a Belgian astronomer named Adolphe Quetelet, who built it in the 1830s to describe the statistical "average man" and explicitly warned against using it on individuals, to physiologist Ancel Keys, who rebranded it as the Body Mass Index in 1972 after studying white European and American men. It stuck because insurance companies wanted to predict how likely you are to die. The conversation moves into what Srdjan does measure instead — muscle mass — and why the body fat percentages you see on social media are a temporary, miserable, peak-week illusion that even competitors can't hold onto year-round. A genuinely healthy, strong person looks kind of normal. You'll know it by how you feel — energy, strength, good labs, the ability to get out of a chair unassisted at 80 — not by whether your abs show in July. And because a body that's causing you stress and anxiety isn't actually healthy, the real goal is feeling good physically and mentally, without the extremes. Build muscle, stop measuring the wrong things, and throw the scale away. KEY TAKEAWAYS * Healthy weight is a range, not a number. It's where your body functions well — balanced muscle and body fat, stable energy, good recovery, healthy labs. * The scale measures the least useful thing. It can't see muscle, metabolism, or visceral fat. "Skinny fat" — thin on the outside, metabolically unhealthy on the inside — is the proof. * BMI has a questionable pedigree. Built by an astronomer for population statistics, never meant for individuals, popularized by insurers tracking mortality. It can't tell muscle from fat, which is why Srdjan himself gets classified as "obese." * Muscle mass is the number to watch. More muscle speeds metabolism, lowers body fat (including visceral fat), and regulates nearly everything. And it declines with age, so building it early matters. * Focus on what you're gaining, not losing. Reframing from "I need to lose weight" to "I need to build muscle" is what actually produces fat loss — and it sticks. * Single-digit body fat is a peak-week illusion. Those shredded photos are taken right after a competition; even competitors can't maintain it. Around 20% body fat can be perfectly healthy with good muscle mass. * Health is psychological too. If a target weight or body fat is causing stress and anxiety, that's a sign it's the wrong target. * The stuff that matters doesn't photograph. Joint health, mobility, getting out of a chair at 80 — none of it shows up in a Speedo shot, and all of it matters more. Links & Notes * Submit your questions to the show! [https://coda.io/form/Ask-The-Trainer-Questions-for-Build-For-Health_dQ_Ip5RWkKF]