Tag: Sarcopenia

A wooden table in warm morning light with a coiled cloth tape measure, a small hand weight and a folded linen cloth

Does Menopause Cause Weight Gain, or Is It Just Aging?

On By Dr. Scott RennieIn Menopause & Women's Health, Weight Loss & Metabolic HealthLeave a comment

Your weight has been climbing about a pound a year since your early forties. Then something else changed. Same body, rearranged. The jeans that caught at the hip now catch at the waist.

Aging put the weight on. Menopause moved it.

The scale was never the menopause story

The Study of Women’s Health Across the Nation tracked women through the transition with repeated DXA scans. Weight and BMI gains that begin in premenopause “continue on an unaltered trajectory” through it, then flatten after the final period (1). Menopause does not bend the weight curve. The curve was already bending.

Two SWAN numbers circulate and both are real. In the full cohort of 3,064 women aged 42 to 52, weight rose 2.1 kg over three years, about 0.7 kg a year (2). In the smaller DXA sub-cohort, inside the 3.5-year window around the final period, 0.25 kg a year (1). Call it a pound to a pound and a half a year through midlife, none of it accelerated by menopause.

Where the fat goes

In 380 SWAN women with serial DXA, visceral fat drifted down before the transition at 1.85% a year, then climbed 6.24% a year inside the transition window (95% CI 4.31 to 8.17), settling at 1.47% after (3). Android fat went from 1.21% to 5.54%; the hip and thigh depot only to 2.03%. Lean mass flips sign in the same window, from gaining 0.2% a year to losing 0.2% (1), on top of the 3% to 8% per decade women lose after 30 (4).

Waist girth, meanwhile, rises 0.55% a year before the transition and 0.96% during it (3). Visceral fat moves six times faster than the tape can see, which is why a stable BMI and an unchanged waist are not reassurance.

Your metabolism did not crash at 50

Doubly labeled water, the reference method for what a human actually burns, was applied to 6,421 people across 29 countries. Total expenditure, basal expenditure and fat-free mass were “all stable from age 20 to 60” (5). The break point for adjusted total expenditure sits at 63.0 years, and the decline after it runs 0.7% a year (5).

The estradiol-specific effect is real and modest. Forty-five premenopausal women were randomized to ovarian suppression with placebo or transdermal estradiol add-back. Resting expenditure fell 54 kcal a day on placebo and did not fall at all with estradiol (6). Fifty-four calories. Measurable. Not a collapse.

Why it happens, and how much of that is known

Less than the confidence of the explanations would suggest. Estradiol loss lowers resting expenditure, since add-back prevented it in a randomized design (6), and the redistribution is time-locked to the final period rather than to birthdays (3). Past that it thins out fast. The one randomized ovarian-suppression trial measuring body composition and free-living expenditure together, 34 women over 24 weeks, found no endpoint that differed between groups (7). The Menopause Society says estrogen regulation of energy intake and expenditure “has not been well studied,” with “a paucity of studies” on estrogen and skeletal muscle (8). Falling estradiol, rising FSH, the androgen-to-estrogen shift: nobody has sorted out which drives it.

What shows up on your labs

SWAN modeled cardiovascular risk factors two ways in 1,054 women with a natural final period, once as chronological aging and once as ovarian aging. Only total cholesterol, LDL cholesterol and apolipoprotein B jumped inside the year before and after the final period (9). Glucose, insulin, blood pressure, fibrinogen and CRP fit the plain aging model (9), and the American Heart Association agrees (10).

So insulin resistance is not independently menopause-driven, whatever you have been told. The visceral fat is menopause-linked, and visceral fat drives insulin resistance on its own. A chain, not a shortcut, and it points at different treatment.

Here is where my own practice diverges from the cohort data. I screen lipids and apoB at intake, before starting any medication for weight loss, so my trigger is the visit rather than the menopausal stage. For hormone therapy I don’t routinely order them. I give the patient the options and tell her up front that insurance sometimes will not pay for apoB or apoA testing, which turns out to be a real constraint on what actually gets drawn.

Lift something heavy, then eat enough protein to use it

101 randomized trials, 5,697 postmenopausal women. Training raised fat-free mass 0.66 kg and cut fat mass 1.27 kg, and the modalities split: resistance work won for lean mass (+0.90 kg), aerobic for fat and waist (1.94 kg, 2.30 cm) (11).

Protein partners that work rather than replacing it. In 776 postmenopausal women aged 55 and older, whey improved lower-limb lean mass and strength when paired with resistance training, and had “no significant benefit on muscle strength or lean mass” without it (12). The powder is not the intervention.

Write down 1.2 g of protein per kilogram daily, 150 minutes of moderate activity weekly, strength training twice a week (4). On an incretin, higher: 1.2 to 1.6 g/kg/d, strength work three times weekly (13).

The strongest diet trial here is a prevention trial

The Women’s Healthy Lifestyle Project randomized 535 premenopausal women, mean age 47, and followed them 54 months through the transition. The intervention group finished 0.2 lb lighter. Controls gained 5.2 lb (14). Which diet matters less: 144 centrally obese postmenopausal women randomized to an energy-restricted Mediterranean or Central European diet both lost 7.6 kg and 24.6% of visceral fat in 16 weeks, with no difference between arms (15). Choose the one you will still be doing next year.

Hormone therapy, stated precisely in both directions

A Cochrane review of 28 randomized trials and 28,559 women found no evidence that estrogen alone or estrogen with progestogen affects body weight or prevents the BMI increase normally experienced at menopause (16). That review is old, last published in 2000, and still the largest pooled analysis of that endpoint. Hormone therapy does not cause weight loss, and it does not prevent menopausal weight gain.

What it does is narrower. The Menopause Society’s own key point: hormone therapy “may help attenuate abdominal adipose accumulation and weight gain associated with the menopause transition,” and “the effect is small” (8). In the WHI, no significant slowing of weight gain and a lesser waist increase over three years (8). On muscle, systematic reviews find neither benefit nor harm (8). A 2026 review is blunt: hormone therapy “should not be marketed or prescribed for weight loss or obesity treatment” (17).

Good drug. Vasomotor symptoms, genitourinary syndrome, bone. Abdominal fat is not on that list.

My own practice, stated plainly: I don’t prescribe MHT for patients who want to lose abdominal fat.

GLP-1s and the muscle question

Menopausal status does not blunt these drugs. A post hoc SURMOUNT analysis by reproductive stage found tirzepatide produced 23% weight reduction in postmenopausal women against 3% on placebo, matching premenopausal women at 26% versus 2% (18).

Now the counterintuitive part. In the SURMOUNT-1 DXA substudy, 160 participants scanned at baseline and week 72, tirzepatide produced 21.3% weight loss, 33.9% fat mass loss and 10.9% lean mass loss (19). Of the weight lost, roughly 75% was fat and 25% lean in both the tirzepatide and the placebo arms (19). The lean loss scales with the weight lost rather than with the drug.

DXA lean mass is also not muscle. It counts water, glycogen and organ mass, and modeling puts true muscle loss nearer 10% to 15% of weight reduction in women who are not strength training (13). In a 106-patient semaglutide cohort, grip strength rose 4.1 kg at a year and sarcopenic obesity fell from 49% to 33% (20). Function can improve while the DXA number falls.

Still, nobody has published incident sarcopenia or functional outcomes for postmenopausal women on these drugs. That gap is why protein and lifting belong in the prescription.

When I start a postmenopausal patient on an incretin, the instruction is 1.6 g of protein per kilogram of body weight a day, and strength training two to three times a week. That is the top of the range the evidence supports (13), and I put it there on purpose.

What is oversold

Supplements sold for menopausal weight loss. I looked for a randomized trial of any of them showing meaningful weight or visceral fat reduction and found none. Absence of evidence in one search is not proof of absence, so put it precisely: the marketing category exists; the trial literature does not. The Menopause Society does not recommend supplements or herbal remedies even for hot flashes (21).

Hormone therapy stacked on a GLP-1. Two retrospective cohorts, no randomized trial, and the 2026 review is unambiguous: do not start hormone therapy to boost an obesity medication (17).

And one asymmetry worth getting exactly right. Treating hot flashes or insomnia in order to lose weight has no trial behind it that I can find. The reverse direction is supported: the Menopause Society recommends weight loss for vasomotor symptoms, conceding those studies are small pilots and post hoc analyses (21).

If you are the patient reading this

Stop asking whether menopause made you gain weight. Ask where it went. Your BMI can sit still while visceral fat climbs 6% a year (3), so get lipids and apoB checked around your final period (9). Then put your effort where the randomized evidence is: resistance training, and a deficit you can hold for years.

Which raises the obvious question for a practice that runs entirely over video. So here is what I actually do. Patients get a Withings scale that syncs into the chart on its own and reports weight, BMI and body fat. A blood pressure cuff syncs the same way, automatically. The waist they measure themselves, with a tape, because the scale will not catch what the tape catches. Weight and blood pressure come in at least monthly and often more frequently than that, which means the trend is visible long before an annual visit would have found it.

For the clinicians

Screening beats explaining. The window runs roughly two years before to 18 months after the final period (1), and that is when lipids move and visceral fat accelerates (3)(9). Order the panel with apoB in it, and do not reassure a woman on a stable BMI or an unchanged waist; both understate a 6.24% per year visceral gain (3). When you start an incretin, write the protein target and the strength training into the plan (13). Hormone therapy earns its place on symptoms, bone and the diabetes signal (8), and no line at all on the weight plan.

The Bottom Line

Aging adds the weight, roughly a pound and a half a year through midlife, on a curve menopause does not bend (1)(2). Menopause moves the fat, visceral gain going from minus 1.85% to plus 6.24% a year inside a 3.5-year window (3). Metabolism holds steady to 60 (5). Hormone therapy treats symptoms and bone, not weight (8)(16). What changes the outcome is lifting, protein, a deficit you can sustain, and where indicated, a medication that works as well after menopause as before (11)(18).

Related Reading

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Scott Rennie, D.O.
Board Certified in Obesity Medicine and Family Medicine

This blog is for educational purposes only and does not constitute individual medical advice. Always consult your own physician before making changes to your health, medications, or treatment plan.

Sources

1. Greendale GA, et al. Changes in body composition and weight during the menopause transition. JCI Insight 2019. https://pmc.ncbi.nlm.nih.gov/articles/PMC6483504/

2. Sternfeld B, et al. Physical activity and changes in weight and waist circumference in midlife women. Am J Epidemiol 2004. https://academic.oup.com/aje/article/160/9/912/86561

3. Greendale GA, et al. Changes in regional fat distribution and anthropometric measures. J Clin Endocrinol Metab 2021. https://pmc.ncbi.nlm.nih.gov/articles/PMC8372653/

4. The Menopause Society. MenoNote: Midlife Weight Gain, 2025. https://menopause.org/wp-content/uploads/for-women/MenoNote-Weight-Gain.pdf

5. Pontzer H, et al. Daily energy expenditure through the human life course. Science 2021. https://doi.org/10.1126/science.abe5017

6. Melanson EL, et al. Regulation of energy expenditure by estradiol in premenopausal women. J Appl Physiol 2015. https://pmc.ncbi.nlm.nih.gov/articles/PMC4628992/

7. Gavin KM, et al. Ovarian suppression in premenopausal women: no change in free-living energy expenditure. Obesity 2020. https://pmc.ncbi.nlm.nih.gov/articles/PMC7653843/

8. North American Menopause Society. 2022 hormone therapy position statement. Menopause 2022. https://menopause.org/wp-content/uploads/professional/nams-2022-hormone-therapy-position-statement.pdf

9. Matthews KA, et al. Chronological aging or the menopausal transition? J Am Coll Cardiol 2009. https://doi.org/10.1016/j.jacc.2009.10.009

10. El Khoudary SR, et al. Menopause transition and cardiovascular disease risk. Circulation 2020. https://doi.org/10.1161/CIR.0000000000000912

11. Khalafi M, et al. Exercise training and body composition in postmenopausal women. Front Endocrinol 2023. https://pmc.ncbi.nlm.nih.gov/articles/PMC10306117/

12. Kuo YY, et al. Whey protein supplementation in postmenopausal women. Nutrients 2022. https://pmc.ncbi.nlm.nih.gov/articles/PMC9572824/

13. Mozaffarian D, et al. Nutritional priorities to support GLP-1 therapy for obesity. Am J Clin Nutr 2025. https://pmc.ncbi.nlm.nih.gov/articles/PMC12612741/

14. Kuller LH, et al. Women’s Healthy Lifestyle Project: results at 54 months. Circulation 2001. https://doi.org/10.1161/01.cir.103.1.32

15. Bajerska J, et al. Energy-restricted Mediterranean and Central-European diets in postmenopausal women. Sci Rep 2018. https://pmc.ncbi.nlm.nih.gov/articles/PMC6057942/

16. Kongnyuy EJ, et al. Hormone replacement therapy: weight and body fat distribution. Cochrane Database Syst Rev CD001018. https://www.cochrane.org/evidence/CD001018_hormone-replacement-therapy-has-no-effect-body-weight-and-cannot-prevent-weight-gain-menopause

17. Younglove C. Menopause hormone therapy in weight management. Obesity Pillars 2026. https://pmc.ncbi.nlm.nih.gov/articles/PMC13010941/

18. Tchang BG, et al. Weight reduction with tirzepatide by reproductive stage: SURMOUNT post hoc analysis. Obesity 2025. https://doi.org/10.1002/oby.24254

19. Look M, et al. Body composition changes with tirzepatide in SURMOUNT-1. Diabetes Obes Metab 2025. https://doi.org/10.1111/dom.16275

20. Alissou M, et al. Semaglutide, fat mass, lean mass and muscle function: SEMALEAN. Diabetes Obes Metab 2026. https://pmc.ncbi.nlm.nih.gov/articles/PMC12673431/

21. North American Menopause Society. 2023 nonhormone therapy position statement. Menopause 2023. https://menopause.org/wp-content/uploads/professional/2023-nonhormone-therapy-position-statement.pdf

A bowl of Greek yogurt with blueberries, two brown eggs and a glass of water on a wooden table in morning window light

Do Ozempic and Zepbound Cause Muscle Loss?

On By Dr. Scott RennieIn Weight Loss & Metabolic HealthLeave a comment

Every few months a new worry about GLP-1 therapy moves through the news cycle. Lately the one I’m fielding most on video visits is muscle. Patients read a headline about “Ozempic muscle” or see a segment warning that these drugs are quietly turning people frail, and they show up to their visit asking whether the weight they’re losing is actually fat, or whether they’re hollowing out their strength along with it. Most just phrase it in terms of what they saw online: GLP or Ozempic muscle loss. Truth is, most of my patients aren’t that worried about it at first. They’re focused on getting the fat off. But some have seen the scare ads on Facebook and other social media railing against GLP-1 medications in general, touting muscle loss as the reason to avoid them. It’s a fair question, and it deserves a real answer.

What the data actually shows

Here’s the uncomfortable part first: the concern isn’t manufactured. Across GLP-1 and dual-agonist trials, roughly 25 to 40 percent of total weight lost is lean mass rather than fat mass, and that share climbs with higher doses and greater total weight loss. In patients losing more than 15 percent of body weight on high-dose therapy, average lean mass decline runs in the range of 10 to 15 percent. That’s not trivial, and it’s higher than what we’d want to see if the sole measuring stick were “weight coming off.”

Lean mass loss and clinically meaningful muscle loss aren’t the same thing, though, and this is where I think the public conversation gets sloppy. Lean mass includes water, organ tissue, and connective tissue alongside contractile muscle. Some degree of lean mass loss happens with any significant weight reduction, including bariatric surgery and aggressive caloric restriction without any medication at all. The relevant clinical question is whether strength and function held up, and whether frailty risk moved. On that narrower and more important question, the current evidence is reassuring for most patients: there’s no consistent signal that GLP-1-induced weight loss causes outright sarcopenia or functional decline in the general obesity population studied so far.

Where the concern sharpens is in specific subgroups: adults over 65, patients with baseline sarcopenia or frailty, and anyone starting from a lower muscle reserve. That’s the population where I’m paying closer attention now, more than the healthy 40-year-old with obesity and good baseline strength.

What’s changing in how we prescribe

A few practical shifts have made their way into how I approach this with patients this year. When muscle preservation is a priority, I start low and titrate slower. This isn’t new advice for tolerability, but it applies here too: aggressive, fast weight loss appears to pull proportionally more from lean mass than a slower trajectory toward the same endpoint.

Protein intake is no longer an aside I mention on the way out the door. Current guidance points to 1.2 to 1.6 g/kg of body weight per day for patients on GLP-1 therapy, meaningfully higher than general population recommendations, and given how much these medications suppress appetite, hitting that number takes real intention. I’ve started asking patients to walk me through a typical day’s protein intake rather than assuming they’re getting enough just because they’re eating less overall.

Resistance training is now part of the treatment plan itself, prescribed with the same specificity as the medication. Two or more sessions a week of resistance work is the most consistent lever we have for preserving lean mass during GLP-1-driven weight loss. For patients who’ve never lifted weights, even bodyweight or band-based resistance work at home is a reasonable starting point, and it’s worth a specific referral to physical therapy or a trainer rather than a general nudge.

And I’m tracking more than the scale. For patients on higher doses, losing significant weight, or starting from a place of reduced muscle reserve, I’m now discussing body composition tracking, whether that’s a DEXA scan, bioelectrical impedance, or simply following functional measures like grip strength and chair-stand time, rather than relying on weight alone to judge how treatment is going. I’ll say plainly: I don’t yet fully trust the consumer-grade body composition numbers patients bring me on their phones. Grip strength and chair-stand time are the measures I put the most weight on. Over video I’m relying on what a patient can demonstrate on camera and tell me, rather than testing it myself, which is a real limitation of doing this work remotely.

Muscle is not the only tissue worth watching on these drugs. Nerve complaints turn up too, from skin that hurts to the touch through to the more serious neuropathies, and the risk of both rises with dose and with how fast the weight comes off. I cover that separately in GLP-1 skin and nerve pain.

What’s coming that may change this conversation further

Drug development is moving on this too, well past prescribing technique. At the American Diabetes Association’s 85th Scientific Sessions this year, early data from the BELIEVE study looked at bimagrumab, an antibody that blocks activin receptor signaling, paired with semaglutide, specifically to see whether it could preserve lean mass during GLP-1 weight loss without blunting fat loss. Separately, researchers at Stanford published mouse data in June showing that a muscle-repair-targeted compound improved muscle regeneration and strength recovery alongside GLP-1 treatment, again without compromising fat loss. Neither approach is available for patients today, but they reflect where the field is heading: toward combination approaches that decouple fat loss from lean mass loss more deliberately.

Where the newer agents in the pipeline land on this question is also worth watching. Retatrutide, the triple GIP/GLP-1/glucagon agonist from Lilly, posted strong topline results across its TRIUMPH program this year, with weight loss in the 20 to 28 percent range depending on the trial population, and a BLA submission is planned for early 2027. Amgen’s MariTide, a monthly injectable combining a GLP-1 agonist with an amylin antibody, showed roughly 20 percent weight loss in Phase 2 with a safety profile consistent with the existing GLP-1 class. Body composition data from both programs will matter as much as the topline weight-loss numbers once they mature.

The bottom line

Muscle loss with GLP-1 therapy is real, but it’s manageable, not a reason to avoid treatment or panic mid-course. Older adults and anyone with baseline frailty need the closest attention, and so does anyone pursuing rapid, high-percentage weight loss on a higher dose. I order a DEXA when I actually need an answer to how much of that weight is fat, and it’s an easier call in a patient who might also have osteoporosis, since the same scan answers both questions. Insurance makes this harder than it should be, and plenty of patients who already know they’re overweight don’t want to pay out of pocket just to confirm it. Protein intake and resistance training aren’t optional add-ons anymore. They’re as much a part of the standard prescription as the injection itself.

Related Reading

Weight Loss Drug Side Effects and How Common They Are Why the Scale Isn’t the Best Measure of Weight Loss How Much Exercise Do You Need to Lose Weight? How Do You Actually Lose Weight? A Doctor Explains

Scott Rennie, D.O.
Board Certified in Obesity Medicine and Family Medicine

This blog is for educational purposes only and does not constitute individual medical advice. Always consult your own physician before making changes to your health, medications, or treatment plan.

Sources:

GLP-1 Therapies in 2026: Beyond Blood Sugar and the Scale, AJMC: https://www.ajmc.com/view/glp-1-therapies-in-2026-beyond-blood-sugar-and-the-scale

Should We Be Concerned About Muscle Loss With GLP-1s?, Medscape: https://www.medscape.com/viewarticle/should-we-be-concerned-about-muscle-loss-glp-1s-2026a1000p67

Increasing GLP-1 Use Raises Muscle Loss Concerns, Medscape: https://www.medscape.com/viewarticle/increasing-glp-1-use-raises-muscle-loss-concerns-2026a1000p4h

Deep Dive: GLP-1, Muscle Loss and What It Means, Medscape: https://www.medscape.com/c99/p10/are-concerns-glp-1s-and-muscle-loss-real-or-overblown-2026a1000gdz

New GLP-1 Therapies Enhance Quality of Weight Loss by Improving Muscle Preservation, American Diabetes Association: https://diabetes.org/newsroom/press-releases/new-glp-1-therapies-enhance-quality-weight-loss-improving-muscle-0

Drug enhances muscle repair during GLP-1 weight-loss treatment in mice, Stanford Medicine: https://med.stanford.edu/news/all-news/2026/06/muscle-glp-1.html

Retatrutide FDA Approval Status 2026, freemedicaljournals.com: https://freemedicaljournals.com/blog/retatrutide-fda-approval-status-2026/

Results From Amgen’s Phase 2 Obesity Study of Monthly MariTide, Amgen: https://www.amgen.com/newsroom/press-releases/2025/06/results-from-amgens-phase-2-obesity-study-of-monthly-maritide-presented-at-the-american-diabetes-association-85th-scientific-sessions

Doctor Supervised Weight Loss: What Works Long Term

On By Dr. Scott RennieIn Weight Loss & Metabolic HealthLeave a comment

Telling patients to eat less and move more doesn’t cut it. Obesity is a chronic disease, and progress requires structured, ongoing, individualized care. The hardest part clinically is making sure the weight that comes off is fat rather than muscle.

Losing muscle costs more than strength. It costs independence, recovery capacity, and eventually survival. Older adults and patients with low baseline activity are the most exposed. Poorly managed weight loss produces sarcopenia, the loss of muscle mass and function. Layer excess fat on top and you get sarcopenic obesity, where a patient looks heavy and is functionally weak and metabolically compromised at the same time.

The European Working Group on Sarcopenia in Older People sets out how to catch it early. It starts with loss of strength, measured by grip strength or a chair-stand test. DXA or BIA can confirm low muscle mass. Poor strength plus low mass plus reduced physical performance defines severe sarcopenia. These definitions give us a framework to act before decline becomes permanent (Cruz-Jentoft et al., Age Ageing, 2019).

Muscle mass predicts survival on its own. Appendicular Lean Mass Index, lean tissue in the arms and legs divided by height squared, is a reliable measure, and people in the top quartile carry substantially lower all-cause mortality than those in the lowest, even after adjusting for BMI and comorbidities (Srikanthan & Karlamangla, Am J Med, 2014). Put plainly, a patient with stronger arms and legs has better odds of living longer regardless of what the scale says.

Strength testing matters as much as mass. Low grip strength tracks with higher mortality from cardiovascular disease, cancer, and respiratory illness. Poor lower-body strength, showing up as slower gait speed or difficulty rising from a chair, tracks with frailty, hospitalization, and long-term disability.

Both measures are cheap and fast, and both are underused. Grip strength needs a dynamometer and a hand to put it in, which rules it out of any remote encounter. The 30-second sit-to-stand doesn’t. A hard chair, arms crossed over the chest, as many stands as the patient can complete in thirty seconds, counted by whoever is watching. It works over video as well as it works in a room, and it yields a number worth tracking across visits. One usable functional measure beats a chart full of weights.

Nutrition is the cornerstone of preserving muscle during weight loss. The baseline protein RDA of 0.8 g/kg/day is inadequate for many adults, particularly older patients and anyone in a calorie deficit. The evidence supports closer to 1.2 to 1.6 g/kg/day, and up to 2.0 g/kg/day in some medically supervised cases (Paddon-Jones et al., Am J Clin Nutr, 2015; Bauer et al., J Am Med Dir Assoc, 2013). Spacing intake across meals rather than loading it at dinner sustains muscle protein synthesis better. Whey and casein, soy, eggs, and blended plant sources all work.

Calculating a target in patients with obesity is genuinely awkward. Actual body weight overshoots. Ideal body weight undershoots. Adjusted body weight is the usual compromise, and reasonable clinicians disagree about which to use. For a 5’6″ patient, a target weight around 73 kg at 1.5 g/kg puts the daily goal near 110 grams, which is a number a patient can actually work with.

Exercise has to include both resistance and aerobic work. Resistance training protects and builds lean mass. Aerobic activity improves cardiovascular and metabolic health. A 2022 systematic review and meta-analysis found the combination conferred the greatest mortality risk reduction, and notably found that weight training alone wasn’t associated with lower mortality among people doing no aerobic exercise (Shailendra et al., Am J Prev Med, 2022). For a patient that translates to brisk walking or cycling most days plus two or three weekly strength sessions using bands, weights, or bodyweight.

Think of muscle like a retirement account. Build it and hold it early, so it is there when it is needed. A patient in their seventies who lands in the hospital with pneumonia can lose a large fraction of their reserve to a few days of immobility and poor intake. If the reserve was thin going in, the decline may be permanent, and it shows up later as falls, fractures, and lost independence. Investing ahead of time changes that trajectory.

Medication is a real adjunct, and it has to be paired with strategies that protect lean tissue. GLP-1 receptor agonists produce substantial weight loss, and a meaningful fraction of that loss is lean mass. Adequate protein and resistance training are the mitigation strategies with actual evidence behind them, and body composition deserves monitoring wherever it is available rather than weight alone.

As clinicians, we need to screen past BMI. Ask about physical activity. Get a functional measure. Consider dietary adequacy. Refer to dietitians, physical therapists, or trainers where it helps, and even a single session with a trainer improves safety and confidence with resistance work. Set goals patients can hold: one to two pounds a week of fat loss while protecting muscle.

Obesity treatment is chronic care. The point is helping patients hold strength, mobility, and independence while metabolic health improves, and preserving muscle sits at the center of that.

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Scott Rennie, D.O.

References:

1. Cruz-Jentoft AJ, et al. Sarcopenia: revised European consensus on definition and diagnosis. Age Ageing. 2019;48(1):16-31. https://pubmed.ncbi.nlm.nih.gov/30312372/

2. Srikanthan P, Karlamangla AS. Muscle mass index as a predictor of longevity in older adults. Am J Med. 2014;127(6):547-553. https://pubmed.ncbi.nlm.nih.gov/24561114/

3. Paddon-Jones D, et al. Protein and healthy aging. Am J Clin Nutr. 2015;101(6):1339S-1345S. https://pubmed.ncbi.nlm.nih.gov/25926511/

4. Bauer J, et al. Evidence-based recommendations for optimal dietary protein intake in older people: a position paper from the PROT-AGE Study Group. J Am Med Dir Assoc. 2013;14(8):542-559. https://pubmed.ncbi.nlm.nih.gov/23867520/

5. Shailendra P, et al. Resistance Training and Mortality Risk: A Systematic Review and Meta-Analysis. Am J Prev Med. 2022;63(2):277-285. https://pubmed.ncbi.nlm.nih.gov/35599175/

Board Certified in Obesity Medicine and Family Medicine

This blog is for educational purposes only and does not constitute individual medical advice. Always consult your own physician before making changes to your health, medications, or treatment plan.