Your calf size over time offers a simple clue about falls

Here is something you can check at home in two minutes. A study of older adults found that people whose calves got noticeably thinner over three years reported more falls. The calf is easy to measure with a tape, so you can watch it yourself and act early.

The finding is a signal, not a sentence. Thinner calves point to less leg muscle, and leg strength is something you can work on at any age.

How the study worked

Researchers followed 7068 adults aged 60 or older in China. Each person had their calf measured in 2018 and again in 2021, and later reported whether they had fallen. The results were published Oct. 1, 2026, in JAMA Network Open. Because this kind of study observes people rather than testing a treatment, it shows a link, not proof of cause.

What they found

About 1 in 4 people (23.64%) reported a fall during the roughly three years of follow-up.

The more the calf shrank, the more falls were reported. Here is how the groups compared with people whose calves did not shrink at all:

The exact figures were 32.5% higher for a loss of 5 cm or more, and 48.1% higher for a loss of 20% or more. Smaller losses showed smaller differences. Each extra centimeter lost went along with a slightly higher chance, and each 10% lost went along with about 10% higher.

The comparison group included people whose calves stayed the same and people whose calves grew. The researchers also took into account age, sex, earlier falls, daily habits, how well people managed everyday tasks, and chronic conditions. That means the link did not come simply from older or sicker people having more falls.

Why the calf?

Your calf muscles help you push off when you walk, keep your balance and get up from a chair. Measuring muscle mass usually takes special scans. A tape measure around the calf is a simple, painless stand-in that gives a rough idea of how much leg muscle you have.

The authors suggest that tracking calf size over time could be a practical, low-cost way to support fall risk checks. In plain terms: one number written down today gives you something to compare with next year.

What you can do today

Grab a soft tape measure, the kind used for sewing. Sit with your foot flat on the floor, wrap the tape around the widest part of your calf and read the number. Write it down with today’s date, and do the same for an older relative if you help care for them. Set a reminder to measure again in a year.

Then put your leg muscles to work. Strength and balance exercises, enough protein and staying active all help keep legs strong. A good first step is standing up from a sturdy chair and sitting back down a few times. Many local YMCAs and senior centers, and many Medicare Advantage plans, offer strength and balance classes, so it is worth asking what is near you.