Physical weakness

What is important to know

It is important to distinguish the subjective feeling of weakness from an objective decrease in muscle strength.

With subjective weakness, a person may feel a pronounced lack of strength, but when tested, the muscles retain the ability to perform movements.

With objective muscle weakness, it actually becomes more difficult, for example, to raise an arm, hold an object, get out of a chair or climb stairs.

Feelings of physical weakness can accompany depression, chronic stress, anxiety and severe exhaustion. When depressed, a person sometimes describes the body as heavy, “exhausted,” or requiring excessive effort even for simple activities.

However, the presence of emotional difficulties does not exclude physical causes and should not be the only explanation for the symptom.

Possible reasons

Feelings of weakness may occur when:

lack of sleep or severe fatigue;

chronic stress;

depression and anxiety;

malnutrition or dehydration;

anemia;

infections;

dysfunction of the thyroid gland;

glucose level disorders;

low blood pressure;

chronic pain;

some cardiovascular, neurological and other diseases;

taking certain medications;

using alcohol or other substances.

This list is not intended for self-diagnosis.

How physical weakness may manifest itself

A person may notice:

feeling of “wobbly” or heavy legs;

difficulty climbing stairs;

the need to sit down or rest more often;

rapid exhaustion during normal exercise;

feeling that the body has become less resilient;

difficulties performing usual everyday activities;

weakness after waking up or at certain times of the day;

a combination of weakness with dizziness or trembling;

decreased activity due to a feeling of lack of strength.

What to pay attention to

How long ago the weakness began and whether it appeared gradually or suddenly.

Is it felt throughout the body or only in a certain part.

Is there a real decrease in strength in the arms or legs.

Does the condition change after rest, sleep or eating.

Does weakness occur during physical activity or persist even at rest.

Do you have dizziness, shortness of breath, palpitations, or chest pain?

Have your appetite, weight, or level of physical activity changed?

Whether there is fever, pain, nausea or other physical symptoms.

Whether depressed mood, anxiety, apathy or chronic tension persist.

Whether the symptom began after an illness or severe stress.

Did its appearance coincide with the start of taking the medication or a change in dosage.

How much weakness interferes with work, walking, self-care, and daily activities.

What can help

If weakness is associated with temporary overload, lack of sleep or irregular nutrition, it is useful to restore sleep patterns, adequate nutrition and drinking regime and gradually return to normal activity.

With a long-term decrease in activity, it is better to avoid both complete cessation of movement and a sharp increase in load. Depending on the condition, your doctor may recommend gradual physical rehabilitation.

If a person notices that weakness is associated with stress, anxiety, or burnout, addressing these factors can be part of a comprehensive approach. It is important not to use a psychological explanation instead of a medical assessment.

You can also use the PainFlow app, developed with the clinical support of our specialists, to monitor your daily physical condition. It helps you track pain, energy levels, mood, and changes in symptoms based on exercise, sleep, and stress. Such recordings can be useful for understanding the dynamics of the condition and discussing it with a specialist. PainFlow is not a substitute for diagnosis or medical treatment.

When to ask for help

Call your doctor if physical weakness persists for several weeks, gets worse, appears for no apparent reason, or noticeably limits your usual activities.

Medical evaluation is especially important if weakness is accompanied by unexplained weight loss, severe shortness of breath, palpitations, persistent dizziness, fever, pain, or other noticeable physical symptoms.

Urgent medical attention is needed if weakness occurs suddenly, especially on one side of the body, or is accompanied by speech problems, facial asymmetry, numbness, loss of coordination, severe chest pain, difficulty breathing, loss of consciousness, or confusion.

If weakness is combined with persistent depression, loss of interest, apathy or severe anxiety, consultation with a mental health professional is also necessary.