Early Detection of Sarcopenia: Why Raising the Grip Strength Standard is Beneficial

Sarcopenia - the loss of muscle mass and function with age - is one of the main causes of disability, falls, and mortality in older adults. Early diagnosis is critical: the earlier you start, the easier it is to reverse. But a new study from the Federal University of São Carlos, Brazil, published in FAPESP, reveals a problem: the standard diagnostic criteria miss most people at risk. The proposal: raise the threshold.

The Current Criterion: Why It's Not Enough

The global standard for diagnosing sarcopenia (according to EWGSOP - European Working Group on Sarcopenia in Older People) uses grip strength as a first screening. The current threshold:

• Men: less than 27 kg
• Women: less than 16 kg

A person above this threshold is defined as "without sarcopenia." But what if they are actually at risk?

The Brazilian Trial: 7,065 Participants

The team, led by Prof. Tiago Alexandre and Sara Liah, collected data on 7,065 Brazilians aged 50 and over. All underwent:

• Grip strength test (dynamometer)
• Additional functional tests (walking speed, stability)
• Nutritional assessment
• Mortality follow-up over 5 years

They examined: which grip strength screening threshold best predicts mortality?

The Finding: Threshold Too Low = Missed Cases

In the study, they used the classic criterion of 27/16 kg and examined people above it. Even among older adults above the threshold - seemingly "healthy" - many died during the 5 years. The threshold did not catch them.

So they tried a higher threshold. When they raised the threshold to 36 kg for men and 23 kg for women, the results showed:

• Possible sarcopenia rose from 10.6% to 40.1% (4 times)
• Diagnosed sarcopenia from 1.4% to 5%
• Severe sarcopenia from 3.9% to 8.8% (2.3 times)
• The association with mortality remained strong and could be mapped across all sarcopenia stages

In other words: with the higher threshold, the study identified 4 times more people at risk. And more importantly: the higher threshold succeeded in distinguishing between those who died and those who survived.

Why Does This Matter?

Sarcopenia is not a completely reversible process, but if you catch it early, it is. In other studies:

• Starting resistance training in possible sarcopenia: 70-80% of people succeed in returning to normal levels within six months
• In diagnosed sarcopenia: only 30-40% succeed in fully recovering
• In severe sarcopenia: only 10-15%

The current threshold catches people mainly at the diagnosed or severe stage, when it is already difficult to reverse. The new threshold catches them at the possible stage, when there is still time to treat.

"Early detection is the difference between an older adult who has another 15 years of active life and an older adult who needs nursing assistance."

How to Test Yourself at Home

You don't have to wait for a medical checkup. A hand dynamometer (grip strength meter) costs about $30-50 on Amazon. The test is simple:

1. Sit on a chair, back straight
2. Hold the dynamometer in one hand, arm bent at 90 degrees, elbow close to the body
3. Squeeze as hard as you can for 3-5 seconds
4. Repeat 3 times, take the highest result
5. Repeat with the other hand
6. Each hand gives a value. Healthy individuals usually have a 10% difference between hands

According to the new criterion:

• Men below 36 kg: At risk. Start resistance training immediately
• Women below 23 kg: At risk. Resistance training + adequate protein intake

Connection to Malnutrition

The team also discovered something previously unknown: the link between malnutrition and severe sarcopenia is much stronger with the higher criterion. In other words, severe sarcopenia is not just a physical activity problem - it is often a nutritional problem. Fixing one without the other will not suffice.

A two-pronged strategy:

1. Nutritional check: at least 1.2 grams of protein per kilogram of body weight per day
2. Resistance training: 2-3 times a week, 30-45 minutes
3. Both together: results are 2 times better than either alone

Impact on Healthcare Systems

If the new criterion is adopted on a global scale, there are systemic implications:

• 40% of older adults over 60 would fall under the label "possible sarcopenia." This is a daunting number, but it is also reality. Most older adults do not have normal muscle levels
• Health plans should offer screening: 30 seconds with a dynamometer at every family doctor visit after age 60
• Health funds will need to offer training programs: not expensive resources, but targeted ones

In Summary: One Test in 30 Seconds

The new criterion offers a simple approach: one grip strength test every year after age 60. If you are below the threshold, don't wait. Start immediately. It is cheap, simple, and life-saving. Instead of waiting for sarcopenia and a fall, you can catch the condition at an early and reversible stage.