EMS vs TENS: Which Device Does Your Family Need?

In short: TENS masks pain signals; EMS makes muscles contract. If you are choosing for an older parent: persistent aches point to TENS, while weakening legs and a harder time getting out of the chair point to EMS alongside gentle movement. Anyone with a pacemaker should use neither without their GP's say-so.

The one-line difference

TENS (transcutaneous electrical nerve stimulation) targets sensory nerves to dampen pain signals. EMS (electrical muscle stimulation) targets motor nerves to make muscles contract. The units look near-identical — a small controller and skin pads — which is exactly why so many people researching on behalf of a parent end up here unsure which one the situation calls for.

How TENS works, and when it is the right call

TENS delivers a tingling stimulation that interferes with pain messages on their way to the brain — the "gate" effect — and it is a long-established, drug-free comfort option for arthritis aches, back pain and similar persistent complaints in older adults. Physiotherapy departments have used it for decades, and some people find it takes the edge off enough to move more freely. It does nothing to strengthen muscle: switch it off and the underlying weakness is unchanged.

How EMS works, and when it is the right call

EMS produces actual muscle contractions. That matters for the slow muscle loss that creeps in with age — clinicians call it sarcopenia — which shows up as legs that tire on stairs and more effort needed to rise from a chair. If you have noticed mum or dad pushing off the armrests where they used to just stand up, that is a muscle-strength signal, not a pain signal. EMS can give those muscles regular contractions between whatever walking and standing they can still comfortably do; what it can and cannot achieve is covered honestly in our ems device benefits guide.

Which does your parent actually need?

What you are seeing	Points to	Why
Complains of aching knees or back when sitting or at night	TENS	Pain relief is the need; strengthening does not address the ache directly
Struggles to get up from the chair, tires on stairs, walks less than before	EMS + gentle movement	The problem is weakening muscle, which contractions can help keep active
Both aching joints and visibly weakening legs	Often both, used separately	Combination units exist; use TENS for comfort, EMS for activation — different sessions, different settings

Safety for over-70s: the part to read twice

Pacemakers and implanted devices rule out both EMS and TENS unless a cardiologist or GP explicitly approves — this is the non-negotiable one to check before anything is bought.
Any heart condition, epilepsy or cancer: GP conversation first.
Fragile or papery skin needs lower intensities, shorter sessions and a skin check after each use.
Pads never go on the chest, neck or head, or over broken or numb skin.
Someone should supervise the first sessions — small buttons and small print are genuinely difficult, and the right starting intensity is "barely there".

Practical buying notes for families

Whichever way the table points, favour simple controls with clearly stepped intensity, and pads that stay hygienic without constant replacement. On the EMS side that is the EMS Care ABS Trainer Muscle Stimulator (£75.56, free UK delivery, 30-day returns): 10 gradual intensity levels and washable silicone pads that rinse clean — worth having when the user is not the person who would remember to order refill pads. Set it up together the first time using our how to use an ems device walkthrough.

Frequently asked questions

Is EMS safe for someone over 70?

Age itself is not the barrier — health status is. With GP clearance and no implanted devices, older adults can use EMS at gentle settings with supervision at the start. Clinical research on muscle stimulation in older adults exists precisely because keeping ageing muscle active matters so much.

My parent has a pacemaker. Is there any safe way?

Not without their cardiologist's explicit approval, and most families will be advised against it. Do not buy first and ask later.

Can EMS rebuild strength after a hospital stay?

It can help muscles stay active during recovery, and stimulation is used clinically for exactly that — but rebuilding function needs movement too, guided by the discharge physiotherapy advice. Treat EMS as support for the plan, not the plan.

Does the NHS supply these devices?

Pain clinics and physiotherapists sometimes loan TENS units or advise on buying one; EMS for home strength maintenance is generally a private purchase. Ask at the next appointment — the answer varies by service.