Feeling tired in older age

Although feeling more tired can be a typical part of aging, unexplained or extreme exhaustion warrants a medical checkup.

When an older person suddenly can’t get out of bed or displays unusual or sudden fatigue, they’re not necessarily showing typical signs of aging. They may be experiencing an underlying medical problem.

This article discusses the possible causes of extreme fatigue in older adults, including medical conditions, mental health challenges, and daily habits that might drain energy reserves. It also offers some practical steps on how to reduce or prevent such fatigue.

Fatigue can become more prevalent as people age. Research from 2025 indicates that approximately 42.6% of older adults experience physical fatigue, while around 58.2% and 24.0% are prone to developing physical and mental fatigue, respectively.

However, it is crucial to differentiate fatigue from simply being tired. Unlike drowsiness, which an occasional nap might cure, fatigue depletes energy reserves.

This type of fatigue can sometimes be due to medical conditions or lifestyle choices, such as insufficient exercise, excessive alcohol or caffeine consumption, smoking, or lack of sleep. However, this isn’t always the case.

In older adults, “idiopathic fatigue” is fatigue without an identifiable cause. Researchers think this type of fatigue, which peaks among those over age 90, may be connected to the aging brain’s need to exert more effort to accomplish routine tasks.

However, fatigue in older adults can also stem from various medical conditions, including cancer, chronic diseases affecting major organs, sleep disorders, neurological conditions such as Alzheimer’s disease, or vitamin deficiencies.

Anxiety and depression can also cause fatigue, especially when untreated or exacerbated by isolation and loneliness. In fact, 14% of adults over age 60 live with a mental health condition, according to the World Health Organization (WHO).

While fatigue often develops gradually, a person should consult a doctor if it persists beyond 2 weeks or is accompanied by breathing problems during sleep.

A person should also seek immediate medical attention if fatigue appears suddenly alongside other concerning symptoms such as bleeding, pain, dizziness, cardiac arrhythmia, digestive issues, cognitive difficulties, or mobility challenges.

In addition, a person experiencing fatigue should take particular care when performing tasks that require alertness, such as driving. A person should watch for signs such as:

When these signs appear, a person should always pull over safely or let an alert companion drive.

Along with this, a person should be aware that fatigue in an older loved one, when combined with certain additional symptoms, could indicate elder abuse, particularly if their loved one is being cared for by someone else. A person should be aware of signs such as unexplained injuries, worsening mental health, increased bedsores, frequent isolation, and changes in spending.

A person unsure about the source of their fatigue or that of an older loved one should consult a doctor. Identifying any underlying medical condition is essential for receiving the appropriate treatment.

However, if a doctor cannot find a medical cause, older adults can try several strategies to alleviate fatigue. For starters, it is important to stay active as much as possible. It may seem counterintuitive to exercise to ward off fatigue, but experts recommend that older adults get at least 150 minutes of exercise weekly, including aerobic, strength, and balance activities. Even simple, regular walks can count toward this goal.

In addition, while an occasional nap is not likely to cure fatigue, regular naps can be helpful over time. That said, older adults should keep naps under 30 minutes, as longer ones might increase fatigue.

Some other strategies that can support health and, therefore, help reduce fatigue include quitting smoking and limiting alcohol consumption, if applicable, as well as eating a balanced diet focusing on protein, vegetables, and healthy grains. From a mental health standpoint, it is also a good idea to try participating in social activities to reduce boredom and loneliness.

Unlike common tiredness, fatigue penetrates deeper. A short nap can refresh someone who’s merely sleepy, but fatigue is more difficult to eradicate.

When older adults experience this level of exhaustion, it may be related to medical conditions or lifestyle factors. Yet sometimes the cause remains elusive.

Scientists call this “idiopathic fatigue,” suggesting that aging brains must work harder to accomplish what once came easily, both in body and mind.

It is important to identify the cause of fatigue. Otherwise, there are strategies a person can use to optimize their health and help ward off fatigue as they age.