Multiple sclerosis and muscle stimulation

What is multiple sclerosis?

Multiple sclerosis — abbreviated MS — is a chronic, inflammatory, autoimmune disease of the central nervous system (brain and spinal cord). The long projections of nerve cells (axons) are covered by a protective sheath, the myelin sheath. Its role is similar to insulation on electrical wires: it allows nerve impulses to travel quickly and without interference along neural pathways.

In MS the immune system becomes dysregulated and begins to attack the myelin sheath. Because the "insulation" is damaged, nerve signals travel more slowly or may not reach their target at all — this causes the characteristic, varied symptoms of the disease. MS is called the "disease of a thousand faces" for a reason: symptoms vary between individuals and change over time (they may flare or remit).

The most common symptoms of MS — grouped

The symptoms of MS can be divided into three main groups. Developing an appropriate rehabilitation strategy begins with an accurate assessment of these:

Why is regular exercise vital in MS?

MS is not yet curable, but its symptoms can be treated and its progression slowed. Alongside medication, one of your most important tools is regular exercise. This is not merely a recommendation — it is an essential need.

Why? Because unused muscles quickly begin to atrophy. MS already makes movement more difficult — if a sedentary lifestyle is added, a vicious circle develops: you move less → your muscles weaken → movement becomes even harder. Regular exercise breaks this cycle.

Key benefits of exercise in MS

The limits of voluntary movement — where muscle stimulation comes in

No matter how much you know exercise is important, MS can limit that movement. The essence of the disease is damage to the neural pathways originating in the brain, so voluntary movement commands do not reach muscles properly.

What does this mean in practice? You may want to move your leg, but the muscle does not respond properly to the command. Or if it does respond, it tires faster than in a healthy person. Spasticity — pathological muscle stiffness — makes things even harder because it prevents full range of motion.

Voluntary movement — however important — is not always sufficient on its own. This is where adjunct therapy comes in, one of the more favorable being electrical muscle stimulation (NMES, EMS).

How does NMES work in MS?

Electrical muscle stimulation — EMS or NMES — is a treatment method that acts directly on the muscles, bypassing (partly) the damaged central neural pathways. Through electrodes placed on the skin, the stimulator device delivers electrical impulses to the motor endplates of the muscle — from there the impulse travels via the peripheral nerve pathways, which are typically intact in MS.

Important: the muscle cannot tell where the impulse comes from. Whether the signal originates in your brain or from a stimulator, the muscle contracts by the exact same mechanism. The same metabolic processes occur, the muscle develops and strengthens in the same way, and it fatigues in the same way.

The three main types of NMES used in MS rehabilitation

How does muscle stimulation help manage MS symptoms?

NMES can support people with MS in multiple ways. The overview below is worth browsing based on your current symptoms:

Technical notes — which pulse is suitable for MS?

What to expect from treatment — and what not to expect?

Quality-of-life benefits

• Increased independence: improved muscle strength and functional mobility can directly contribute to greater autonomy in daily activities.⁷
• Psychological well-being: participation in physical activity — even if limited — can boost self-esteem and reduce feelings of helplessness.⁷
• Reduction of fatigue: in some cases NMES is associated with reduced fatigue and improved overall physical fitness — paradoxically, a more "active" stimulated muscle can reduce chronic fatigue.⁷