Why Do Doctors Care About Your Handshake?

Your grip may reveal more about healthy ageing than you think. A simple squeeze of the hand has become one of the most widely used measures of muscle strength in ageing research.

It sounds almost too simple. Squeeze a small handheld device as hard as you can and, within seconds, you have a number that can tell health professionals something meaningful about how well your body is ageing.

Grip strength has become an important measure in healthy ageing research. Not because having powerful hands somehow makes you healthier, but because your grip can provide a surprisingly useful window into overall muscle strength and physical function.

Why grip strength?

Researchers could measure lots of different muscles. So why have your hands become such a focus?

What did the research find?

One of the most widely cited studies was the international PURE study, published in The Lancet.

Researchers measured grip strength in almost 140,000 adults and followed participants for a median of four years.

After accounting for other factors, every 5 kg lower grip strength was associated with higher risk across several health outcomes.

Perhaps most strikingly, in this study grip strength was a stronger predictor of all-cause and cardiovascular mortality than systolic blood pressure.

That's an extraordinary finding for something that can be measured with a simple squeeze of the hand.

It's not really about your hands

This is the important part.

You shouldn't read this research and immediately start squeezing a tennis ball 100 times a day.

A stronger grip isn't necessarily what is protecting people.

Instead, people who maintain their overall muscular strength tend to have stronger grips. The grip test simply gives researchers and health professionals an easy way of measuring part of that much bigger picture.

For healthy ageing, maintaining strength throughout the body — particularly the muscles involved in walking, lifting, balance and everyday movement — matters far more than simply developing stronger hands.

Strength is becoming more important than muscle size

Our understanding of age-related muscle loss has also changed.

For years, much of the conversation around ageing focused on sarcopenia, or the loss of muscle mass.

Today, experts increasingly recognise that muscle strength and physical performance can be just as important as the amount of muscle you have.

In fact, European clinical guidance for sarcopenia places muscle strength at the beginning of the assessment process — and grip strength is one of the key ways it can be measured.

The message is simple:

You don't just want to have muscle. You want muscle that still works.

Why this matters as we get older

Muscle strength naturally tends to decline with age, and periods of inactivity, illness or inadequate nutrition can accelerate that decline.

European sarcopenia researchers have reported that after age 50, strength may decline more quickly than muscle mass itself.

Over time, seemingly small losses of strength can begin to affect everyday life: getting out of a chair, carrying groceries, climbing stairs, maintaining balance or recovering after illness.

That's why maintaining muscle isn't simply about looking fit.

It's about maintaining capacity.

The ability to keep doing the things you want to do, for as long as possible.