American Health & Medical Research Association
Practical guide

Frail 90-year-olds nearly tripled their strength, proof that muscle responds at any age

Strength fades faster than muscle size as you age, and grip strength tracks with survival. Trials show lifting works into your 90s, creatine adds a little, and GLP-1 drug users need a strength plan.

By the Health Research USA editorial team

Published Last updated October 2026

Written from the sources listed below; links checked October 2026. It touches on medicines, doses or health conditions and has not yet been reviewed by a licensed clinician, so use it to prepare for a conversation with yours. How we research and review

Sources14, listed below Reading time15 minutes

Where the evidence stands

  • Strong evidence Strength training raises strength in adults 75 and olderIt adds muscle size in adults 75 and older
  • Promising but early Creatine with training adds lean mass and strength in older adultsStrength training protects muscle during GLP-1 weight loss
  • Not enough evidence Typical programs improve grip strength in very old adultsBuilding grip strength lowers your risk of deathCreatine without training builds muscle
  • Evidence says no, or unsafe Vitamin D pills prevent falls in older adults living at homeEveryone loses 1% to 2% of muscle a year after 50

Each use is rated separately, from the scorecard in this guide. Safety cautions are spelled out in the guide itself. How we grade

On this page
  1. Strength fades faster than muscle, and a famous number is wrong
  2. Doctors now define sarcopenia by strength first
  3. Grip strength tracks with survival, though a stronger squeeze isn't a cure
  4. Lifting works in your 70s, 80s and 90s
  5. A strong-for-life plan, by age and starting point
  6. Supplements: creatine adds a little, and vitamin D pills don't prevent falls
  7. On GLP-1 weight-loss drugs, protect the muscle you have
  8. What the evidence shows
  9. Muscle is the body's own medicine cabinet
  10. Questions readers ask
  11. The bottom line

Key takeaways

  • In a 1990 study, 9 frail nursing home residents around age 90 raised their strength 174% and their heel-to-toe walking speed 48% after 8 weeks of hard strength training1.
  • With age, strength drops 2 to 5 times faster than muscle size; at 75, men lose about 3% to 4% of their strength a year, a review found3.
  • In a study of nearly 140,000 adults in 17 countries, each 5-kilogram drop in grip strength was linked to a 16% higher risk of death5.
  • In a review of 22 trials in older adults, adding creatine to strength training added about 1.4 kilograms (3 pounds) of lean tissue, though some leading creatine researchers have industry ties69.
  • In a large semaglutide trial, about 38% of the weight people lost was lean tissue, roughly half of it muscle, and a 2025 expert advisory urges strength training three or more times a week alongside these drugs1011.

In 1990, researchers reported a bold experiment in the Journal of the American Medical Association1. They asked 10 frail nursing home residents, about 90 years old on average and as old as 96, to lift weights hard for eight weeks1.

Before training, the weaker a resident’s thigh muscles, the longer that person took to walk1.

Nine finished. On average, their strength rose 174%, close to triple where they began, and their thigh muscle grew 9%1. Their speed at heel-to-toe walking, a test of balance and control, rose 48%1.

It was a tiny study of 10 volunteers, all of whom trained. Bigger randomized trials since then point the same way2.

Muscle does decline with age. But the decline is slower, more variable and more reversible than many people think, and the new weight-loss drugs add a twist worth planning for.

Strength fades faster than muscle, and a famous number is wrong

You may have read that adults lose 1% to 2% of their muscle every year after 50. A 2012 review in Frontiers in Physiology traced that figure back and found it was misattributed3. The study usually cited for it found about 0.2% a year in men and little change in women3.

Studies that follow the same people over time show smaller losses, below 1% a year3. At age 75, the review estimated3:

  • Muscle size: a loss of about 0.6% to 0.7% a year in women and 0.8% to 1% in men.
  • Strength: a loss of about 2.5% to 3% a year in women and 3% to 4% in men.

Strength drained away 2 to 5 times faster than muscle size in studies that measured both3. Some researchers use the word dynapenia for this decline in strength and nerve-muscle function, keeping sarcopenia for the loss of muscle itself3.

When the loss begins is unclear. Different studies put the start at 27, 45 or 60, and one found arm and leg muscle almost unchanged from 18 to 603.

The review’s bigger point: losing strength predicts disability and death more consistently than losing muscle size3. The newest medical definition reflects that.

Doctors now define sarcopenia by strength first

In 2019, the European Working Group on Sarcopenia in Older People published an updated definition in the journal Age and Ageing4. The group, known as EWGSOP2, called sarcopenia a muscle disease, a kind of muscle failure rooted in changes that build up over a lifetime4. It’s common in older adults, but it can start earlier4.

The update put strength at the center4:

  1. Low muscle strength is the key sign.
  2. Low muscle quantity or quality confirms the diagnosis.
  3. Poor physical performance marks it as severe.

That shift matters for you. Muscle strength is easy to check without a scan, and it’s the part training changes most2.

Grip strength tracks with survival, though a stronger squeeze isn’t a cure

In 2015, a team led by Darryl Leong reported grip strength results from the PURE study in The Lancet5. Using a handheld gauge called a dynamometer, they tested the squeeze of close to 140,000 adults across 17 countries, then tracked their health for about four years5.

For every 5 kilograms (about 11 pounds) of lower grip strength, the risks rose5:

  • Death from any cause: 16% higher.
  • Death from heart disease: 17% higher.
  • Heart attack: 7% higher. Stroke: 9% higher.

Grip strength predicted death more strongly than systolic blood pressure, the top number5.

Weak grip predicted dying from heart disease more strongly than getting it. The authors suggested that low strength may leave people less able to survive an illness when it strikes5.

This was an observational study, which watches people rather than assigning them to train. Whether getting stronger would cut these risks is still an open question, Leong said5. Read grip as a gauge on your dashboard, not the engine.

Lifting works in your 70s, 80s and 90s

Three decades after the nursing home study, researchers pooled the trials. A 2020 review in Sports Medicine gathered 22 randomized trials, where people are assigned by chance, in adults 75 and older2. Most participants were women2.

The findings2:

  • Strength rose by a large amount compared with people who didn’t train, across 17 trials with 880 people.
  • Adults 80 and older gained at least as much, with an even larger average effect.
  • Muscle size grew a little, a small but consistent effect in the 6 trials that measured whole muscles.
  • Grip strength didn’t clearly improve in the 8 trials that measured it.

The programs were modest. They ran 8 to 18 weeks, with 1 to 3 sessions a week and fairly low total work2. Side effects were minor, mostly soreness and one flare of arthritis, with no serious harms tied to training2. The authors used no outside funding2.

You don’t need hours in a gym. Our strength training and bodyweight articles cover sets, reps and equipment-free options.

A strong-for-life plan, by age and starting point

Find your row by age and your column by experience. Train on 2 or 3 nonconsecutive days a week, working legs, hips, back, chest and arms each time.

Age Starting out Some experience Already strong
50s and 60s 2 days; 1 to 2 sets of 8 to 12 reps per move; stop with 3 or 4 reps left in the tank 2 to 3 days; 2 to 3 sets; stop with 2 or 3 reps left 3 days; add heavier sets of 5 to 8 reps for legs and back once form is solid
70s 2 days; machines, bands or chair-based moves; 1 set, building to 2 2 to 3 days; 2 sets; add brisk stair climbing with the rail Keep 2 to 3 days; heavier leg work if your clinician agrees
80s and up, or frail 2 days, supervised by a physical therapist or trainer; seated or supported moves 2 to 3 days, still supervised; gradually heavier, since the 1990 residents trained at high intensity1 Keep training; ask your therapist how to progress safely

Add every week, at any level:

  • Grip work. Carry grocery bags or hand weights for 30 to 60 seconds, or squeeze a firm ball.
  • Stairs. Climb a flight with the rail, a little faster as you improve.
  • Protein at meals. Our protein article covers how much older adults need.

When to move up. If the last reps of every set feel easy for two weeks, add a little weight or a set. If joints ache into the next day, ease off.

The grip and stair self-check

Do this every three months and write the results down. It is a way to catch a trend early, not a diagnosis.

  1. Grip: At a checkup, ask whether the office can measure your grip with a dynamometer, and record the kilograms. At home, note whether you can open a new jar, wring out a wet towel, and carry a full bag in each hand for a minute.
  2. Stairs: Time yourself climbing one flight at a brisk but safe pace, holding the rail. Note whether you pull on the rail or pause.
  3. Compare: A slower stair time, a weaker squeeze or new trouble with the jar is worth raising with your clinician. The 2025 GLP-1 advisory below names stair climbing among the useful tests of muscle function in older adults11.

Supplements: creatine adds a little, and vitamin D pills don’t prevent falls

Creatine is a popular supplement with a sizable body of trials in older adults. A 2017 review of 22 randomized trials, with 721 people averaging 57 to 70 years old, compared creatine with a dummy pill during strength training6. The creatine groups gained about 1.37 kilograms more lean tissue, roughly 3 pounds, plus small extra gains in chest and leg press strength6.

A 2014 review of 357 older adults agreed and found a better chair-stand score, though some strength measures didn’t differ and the authors called for more studies7.

Results in women are less clear. A 2021 review of 10 small trials in 211 women over 60 found gains in upper-body strength but no significant gain in muscle mass, and it rated the evidence low9.

Common doses in these trials were 5 grams a day, sometimes after 5 to 7 days of 20 grams a day89. Reported side effects included stomach upset, cramps and muscle strains8.

Two cautions. Creatine was tested alongside training, and there’s little evidence it builds muscle on its own8. And some of this research comes from scientists with industry ties. Candow, a co-author of three of the reviews cited here, disclosed in the 2021 review industry-sponsored creatine research, donated creatine, travel support and a seat on the scientific advisory board of Alzchem, a creatine maker9. Another co-author, Forbes, had advised a company that sold creatine9.

Yet the 2019 review that both co-wrote declared no commercial or financial relationships8. The mismatch is a reason to read each paper’s fine print. Ties don’t make results wrong, but they earn the scrutiny you’d give any product’s backers.

Vitamin d is a different story. Some people need extra, but pills to prevent falls, which depend partly on muscle, haven’t held up. The U.S. Preventive Services Task Force’s 2018 statement, still listed as final, recommends against low-dose vitamin D and calcium pills to prevent fractures in women past menopause who live at home12. It also notes the Task Force’s advice against vitamin D to prevent falls in adults 65 and older who live at home12.

A December 2024 draft goes further. It recommends against vitamin D, with or without calcium, to prevent fractures or falls in women past menopause and men 60 and older who live at home13. The 2018 fracture advice excludes people with osteoporosis or a known vitamin D deficiency12. Our vitamins and minerals article covers who needs more.

On GLP-1 weight-loss drugs, protect the muscle you have

The new weight-loss drugs work. In the STEP 1 trial, 1,961 adults without diabetes took weekly semaglutide or a placebo, plus lifestyle coaching, for 68 weeks10. The semaglutide group lost 15.0% of their body weight, compared with 3.6% on placebo10.

A subgroup of 140 people had body scans, 95 of them on semaglutide10. In that drug group, fat mass dropped 19.3%, while lean mass, which includes muscle and other tissue that isn’t fat, dropped 9.7%10. Three of the 11 authors were affiliated with Novo Nordisk, which makes semaglutide10.

A 2025 advisory from four groups, the American College of Lifestyle Medicine, the American Society for Nutrition, the Obesity Medicine Association and The Obesity Society, put that in kilograms11. Of the 13.6 kilograms people lost on average, 8.3 kilograms was fat and 5.3 kilograms, about 38%, was lean mass11.

Two facts soften that picture. Only about half of lean mass is muscle, the advisory notes, which puts muscle at roughly a fifth of the weight lost11. And because fat fell faster, lean mass made up a larger share of the body afterward10.

Still, the loss matters more for people who are older, inactive, chronically ill, poorly nourished or living with type 2 diabetes, the advisory says11. What it advises for anyone on these drugs11:

  • Strength work three or more days a week, with at least 150 minutes of moderate aerobic activity on top. Cardio by itself does less to hold on to lean mass.
  • Enough protein. It cites proposed targets of 1.2 to 1.6 grams per kilogram of body weight a day while losing weight, and offers a flat 80 to 120 grams a day as an easier goal.
  • Function checks, such as rising from a chair, climbing stairs and a timed up-and-go walk, which it calls helpful in older adults.

The advisory also points to a one-year randomized trial: people who exercised while taking a GLP-1 drug kept their bone density, while those on the drug alone lost some11. Our bone strength article covers how to load your skeleton.

What the evidence shows

Claim Evidence rating What it rests on
Strength training raises strength in adults 75 and older Strong evidence 17 randomized trials, 880 people2
It adds muscle size in adults 75 and older Strong evidence (small gains) 6 trials of whole-muscle size, consistent results2
Typical programs improve grip strength in very old adults Not enough evidence No clear effect in 8 trials2
Building grip strength lowers your risk of death Not enough evidence The link is observational; no trial tested it5
Creatine with training adds lean mass and strength in older adults Promising but early Reviews show small gains; low certainty in women; industry ties679
Creatine without training builds muscle Not enough evidence Little data8
Strength training protects muscle during GLP-1 weight loss Promising but early Expert advisory based on limited trials11
Vitamin D pills prevent falls in older adults living at home Evidence says no, or unsafe Task Force review1213
Everyone loses 1% to 2% of muscle a year after 50 Evidence says no, or unsafe Long-term studies show under 1% a year3

Muscle is the body’s own medicine cabinet

Natural health trusts the body to respond when you ask something of it. Muscle proves the point at every age. The 1990 residents had no special supplement or device, just weights and hard effort1.

That doesn’t make drugs or supplements enemies. A GLP-1 medicine can be the right choice, and creatine may add a little. But each works best as an add-on to the oldest tool there is: lifting something heavy, often, for the rest of your life.

Apply the same skepticism to everyone selling a shortcut, from drugmakers to creatine companies910. Your strongest evidence will be your own grip, your stair time and how you feel carrying the groceries.

Questions readers ask

I’m 85 and have never lifted. Is it safe to start?

For most people, yes, with guidance. In trials of adults 75 and older, side effects were minor, and the subgroup aged 80 and up showed large strength gains2. Start supervised, with a physical therapist or trainer.

Should I track my muscle with a body-composition scale?

Strength tells you more. EWGSOP2 puts low strength first in diagnosing sarcopenia4, and the GLP-1 advisory notes that body scans measure muscle quantity, not its quality or function11. Track your grip and stair times instead.

Do I need protein shakes to keep my muscle?

Not usually. Food can cover most needs; our protein article gives amounts for older adults. If you’re on a GLP-1 drug and eating little, the advisory’s 80 to 120 grams a day is a target to discuss with your care team11.

Is creatine safe for older adults?

Studies that directly checked kidney and liver function in older adults found no harm, but safety research is limited8. Side effects included stomach upset and cramps8. Ask first if you have kidney disease9.

The bottom line

Muscle shrinks with age more slowly than the popular numbers claim. Strength fades faster, and strength is the part that matters most. Trials show that people in their 70s, 80s and 90s gain real strength from training a few times a week.

Train 2 or 3 days a week at a level that fits you, eat enough protein, and check your grip and stair times every few months. Treat creatine as a modest, optional add-on, and if you start a GLP-1 drug, start a strength plan the same week.

About this article

This article was researched using peer-reviewed trials, reviews and consensus statements, a 2025 joint expert advisory and U.S. Preventive Services Task Force materials, all listed below. It was reviewed in October 2026. It is general education and not medical, legal or financial advice.

Sources

  1. Fiatarone MA, Marks EC, Ryan ND, Meredith CN, Lipsitz LA, Evans WJ. “High-intensity strength training in nonagenarians. Effects on skeletal muscle.” JAMA, 1990;263(22):3029–3034 (Duke University Scholars record). scholars.duke.edu
  2. Grgic J, Garofolini A, Orazem J, Sabol F, Schoenfeld BJ, Pedisic Z. “Effects of Resistance Training on Muscle Size and Strength in Very Elderly Adults: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.” Sports Medicine, 2020;50:1983–1999. link.springer.com
  3. Mitchell WK, Williams J, Atherton P, Larvin M, Lund J, Narici M. “Sarcopenia, Dynapenia, and the Impact of Advancing Age on Human Skeletal Muscle Size and Strength; a Quantitative Review.” Frontiers in Physiology, 2012;3:260. frontiersin.org
  4. Cruz-Jentoft AJ, Bahat G, Bauer J, et al. “Sarcopenia: revised European consensus on definition and diagnosis.” Age and Ageing, 2019;48(1):16–31 (Maastricht University record). cris.maastrichtuniversity.nl
  5. Husten L. “Get a Grip: Global Study Finds Grip Strength Is a Simple and Powerful Predictor of Death” (on Leong DP, et al., The Lancet, 2015, PURE study). CardioExchange, NEJM Journal Watch, May 13, 2015. blogs.nejm.org
  6. Chilibeck PD, Kaviani M, Candow DG, Zello GA. “Effect of creatine supplementation during resistance training on lean tissue mass and muscular strength in older adults: a meta-analysis.” Open Access Journal of Sports Medicine, 2017;8:213–226 (DOAJ record). pubmed.ncbi.nlm.nih.gov
  7. DeVries MC, Phillips SM. “Creatine supplementation during resistance training in older adults: a meta-analysis.” Medicine & Science in Sports & Exercise, 2014;46(6):1194–1203 (McMaster Experts record). experts.mcmaster.ca
  8. Candow DG, Forbes SC, Chilibeck PD, Cornish SM, Antonio J, Kreider RB. “Variables Influencing the Effectiveness of Creatine Supplementation as a Therapeutic Intervention for Sarcopenia.” Frontiers in Nutrition, 2019;6:124. frontiersin.org
  9. Natural Medicine Journal. “Adding Creatine to Resistance Training in Older Females” (review of dos Santos EEP, de Araújo RC, Candow DG, et al., Nutrients, 2021;13(11):3757, including authors’ disclosures). May 24, 2022.
  10. Wilding JPH, Batterham RL, Calanna S, et al. “Impact of Semaglutide on Body Composition in Adults with Overweight or Obesity: Exploratory Analysis of the STEP 1 Study.” Abstract, via Newswise. doi.org Abstract.pdf
  11. Mozaffarian D, Agarwal M, Aggarwal M, et al. “Nutritional priorities to support GLP-1 therapy for obesity: a joint Advisory from the American College of Lifestyle Medicine, the American Society for Nutrition, the Obesity Medicine Association, and The Obesity Society.” American Journal of Clinical Nutrition, 2025;122:344–367 (published online May 30, 2025). cme.cecentral.com
  12. U.S. Preventive Services Task Force. “Vitamin D, Calcium, or Combined Supplementation for the Primary Prevention of Fractures in Community-Dwelling Adults: Preventive Medication.” Final recommendation, April 17, 2018 (update in progress as of October 2026). uspreventiveservicestaskforce.org
  13. HealthDay. “USPSTF Recommends Against Vitamin D Supplementation for Fracture, Fall Prevention” (on the Task Force’s draft recommendation). December 17, 2024. healthday.com
  14. Centers for Disease Control and Prevention. “Adults: Adding Activity Recommendations.” CDC, updated December 4, 2025. cdc.gov