Reviewed by the Help Dementia Editorial Team — our editors review every article for accuracy against guidance from the National Institute on Aging, the Alzheimer’s Association, and peer-reviewed sources.
Yes, losing interest in hobbies you once loved can be a warning sign of dementia, and research shows this change matters more than most people realize. When someone who spent every Saturday morning in their garden suddenly stops tending to plants, or a lifelong reader leaves books unfinished on the nightstand, this shift in motivation and pleasure—called apathy—occurs in approximately 50 to 70 percent of people with dementia. Importantly, this isn’t about aging itself.
It’s a specific change in how the brain processes motivation and reward that warrants attention. The concerning part: apathy can appear years before other recognizable dementia symptoms emerge, making it potentially one of the earliest warning signs a family might notice. A woman in her early sixties who abandons the painting hobby she’d maintained for decades, or a retired engineer who loses interest in restoring his vintage motorcycle, might be experiencing a neurological shift that deserves medical evaluation. But this loss of interest doesn’t automatically mean dementia—depression, physical limitations, and emotional responses to life changes can all cause the same pattern.
Table of Contents
- What Makes Apathy in Dementia Different from Ordinary Loss of Interest?
- How Much Does Losing Interest in Hobbies Really Increase Dementia Risk?
- Profound Anhedonia and Specific Dementia Types
- What to Do If You Notice This Change in Yourself or Someone You Care For
- The Timing and Progression Matter More Than You Might Think
- Why Family Members Often Spot This Before Anyone Else
- Why Recognizing Apathy Early Offers an Important Window
- Conclusion
What Makes Apathy in Dementia Different from Ordinary Loss of Interest?
Apathy in dementia is fundamentally different from simply outgrowing a hobby or losing interest due to life circumstances. In dementia, the person loses the ability to feel motivated or find pleasure in activities they genuinely loved—not because they’ve decided the activity no longer fits their life, but because the brain’s reward and motivation systems are being damaged. This loss of pleasure, medically called anhedonia, appears in about 65 percent of people with Alzheimer’s disease specifically, making it one of the most common behavioral symptoms across all types of dementia. Research shows that apathy is roughly twice as common in people with dementia compared to healthy older adults—meaning it’s not just a natural part of aging. Community-dwelling older adults with severe apathy symptoms are approximately 80 percent more likely to develop dementia than those without significant apathy.
In one research study, 25 percent of people with severe apathy went on to develop dementia within the follow-up period, compared to much lower rates in those with fewer apathy symptoms. This statistical difference is striking: the presence of this symptom substantially increases the risk profile. The distinction matters clinically because true apathy in dementia involves a passive loss of drive rather than an active choice. Someone experiencing apathy from dementia won’t say, “I’m too tired to paint today” or “I’ve lost interest in golf.” Instead, they might paint without any sense of satisfaction or accomplishment, forgetting they ever cared about the activity at all. This passive, reward-resistant pattern is what sets dementia-related apathy apart.
How Much Does Losing Interest in Hobbies Really Increase Dementia Risk?
The numbers on this are sobering. A systematic review analyzing 16 research studies with more than 7,000 memory clinic patients found that apathy was associated with approximately double the risk of developing dementia. When researchers looked specifically at loss of pleasure and interest in activities, they found an even stronger association—approximately five times higher risk of developing dementia and twice the risk of mild cognitive impairment compared to those without this symptom. For people in their mid-60s, researchers have observed that changes in leisure activity participation can signal early cognitive decline. In one study tracking hobby engagement over time, declines in leisure activities during the mid-60s were identified as potentially early indicators of disabling dementia later in life. However, this doesn’t mean every person who shifts hobbies in their 60s is at risk—the key is an unexplained, progressive withdrawal from activities the person previously found meaningful.
One critical limitation here: not every loss of interest predicts dementia. Physical limitations like arthritis might prevent someone from gardening. Depression can cause identical symptoms—anhedonia is a hallmark of major depression. Grief, chronic illness, medication side effects, and life transitions can all create the same pattern. This is why the timing and pattern matter enormously. A sudden, unexplained loss of interest across multiple hobbies—not just one—combined with other cognitive changes, carries more weight than a single lifestyle shift.
Profound Anhedonia and Specific Dementia Types
One particular form of severe interest loss, profound anhedonia, has shown a strong and specific association with frontotemporal dementia (FTD), a less common but devastating early-onset dementia. Research from the University of Sydney found that people with FTD experience a profound loss of pleasure and interest in activities that goes beyond what’s observed in Alzheimer’s disease. This finding is important because it suggests that the specific pattern and severity of apathy can sometimes point toward particular types of dementia. In Alzheimer’s disease, while apathy is extremely common, it typically develops alongside memory problems and cognitive decline. In FTD, however, profound loss of interest and pleasure can be the leading symptom—appearing before significant memory loss is obvious to family members.
A person with FTD might withdraw from all social activities and hobbies while still remembering facts and names, creating a confusing clinical picture where family members struggle to understand what’s happening. This is why the specific type of apathy—whether it’s mild withdrawal or profound loss of pleasure across the board—can sometimes offer clues to underlying cause. The challenge is that frontotemporal dementia is rare and often misdiagnosed as depression or personality change in its early stages. A 55-year-old man who suddenly stops attending his weekly poker games and loses interest in his woodworking, combined with changes in personality and behavior, might be evaluated for depression first. Only when these symptoms continue despite treatment and cognitive testing reveals specific patterns of brain atrophy might FTD be identified. By that point, significant cognitive and behavioral damage may have already occurred.
What to Do If You Notice This Change in Yourself or Someone You Care For
If you notice yourself or a loved one withdrawing from previously enjoyed activities without a clear external reason, the first step is medical evaluation. This means consulting with a primary care physician and, likely, a neurologist or neuropsychologist who can perform cognitive testing and assess the pattern of change. The goal isn’t to jump to dementia as a diagnosis—it’s to identify what’s actually happening and address it appropriately. Importantly, describe the change clearly to your doctor. Rather than saying “Mom isn’t interested in things anymore,” explain: “For the past six months, Mom has stopped gardening, which she did every weekend for 30 years. She says she doesn’t feel like it, but she also seems unaware of how much she misses it.
When we try to get her interested again, she doesn’t engage.” Specific examples of which activities were abandoned, when the change started, and whether the person seems aware of the loss all help doctors differentiate between depression, normal life changes, and neurological causes. Document any pattern you’re observing. Write down when the loss of interest started, which activities were abandoned, and what other changes you’ve noticed cognitively or behaviorally. This information is invaluable during medical appointments. If loss of interest is combined with memory problems, difficulty with familiar tasks, changes in judgment, or changes in personality, these additional symptoms strengthen the case for neurological evaluation. Even if testing comes back normal, baseline cognitive testing now provides a comparison point for any future changes.
The Timing and Progression Matter More Than You Might Think
One of the most critical aspects of apathy as a warning sign is that it can begin decades before other recognizable dementia symptoms surface. A person in their 55th year might start losing interest in hobbies, and not receive a dementia diagnosis until their 70s or even later. This extraordinarily long timeline makes it difficult to draw cause-and-effect conclusions in individual cases, but it also means that family members and caregivers are essentially the first line of recognition for this symptom. The progression pattern matters greatly. If someone loses interest in one hobby due to a shoulder injury and then picks up a different activity, that’s not the same as gradually withdrawing from all hobbies without apparent reason. Progressive, multi-activity apathy developing over months—not as a response to a specific life event or medical condition—carries more weight as a potential dementia warning sign.
A person who enjoyed reading, gardening, woodworking, and socializing, and who gradually stops all of these activities while saying “I just don’t feel like it,” presents a different picture than someone who stops golfing because of a knee injury. One major caveat: the absence of other dementia symptoms doesn’t rule out early cognitive decline. A person in their 60s with apathy but normal memory and functioning on a basic cognitive screening might still be in the earliest stages of a dementia process. This is where family observation over time becomes crucial. Changes that seem subtle in a single month become obvious patterns over a year. Some of the most helpful information doctors receive comes from family members who have noticed a two or three-year trajectory of subtle change.
Why Family Members Often Spot This Before Anyone Else
Family members and close friends are uniquely positioned to notice changes in motivation and interest that might not show up during a doctor’s visit. Your father’s neurologist won’t see him spending three hours staring at a blank canvas instead of painting. His doctor might have a 15-minute appointment where he seems cognitively intact, but you live with or regularly see the behavioral shift. You notice when he stops calling friends, stops attending his bowling league, stops asking about his garden. This observation role matters because apathy can be subtle and context-dependent.
Someone with early dementia might appear engaged and interested during a structured medical appointment but show profound apathy at home. A person might seem fine at a family gathering but show no spontaneous interest in activities. Caregivers and family members who document these observations—in writing, with dates and specific examples—provide the crucial information that can prompt medical investigation. Write down what you observe. Share it with doctors. Don’t assume that if someone seems “fine” in the clinic, they truly are fine.
Why Recognizing Apathy Early Offers an Important Window
The significance of apathy as an early warning sign lies in timing. If apathy can appear years before other dementia symptoms become obvious, then catching this change and seeking evaluation provides the earliest possible intervention window. While there’s no cure for dementia, early diagnosis offers advantages: time to plan, access to treatments that may slow progression in some cases, participation in research studies, and opportunities to make decisions about future care while the person is still fully cognitively capable.
Research continues to clarify the connection between apathy and dementia risk, and understanding this link changes how we interpret behavioral changes in aging. What might previously have been dismissed as “getting old” or “just losing interest in things” is now understood as a potentially significant medical signal. This shift in understanding doesn’t mean everyone with apathy will develop dementia, but it does mean apathy deserves attention, evaluation, and tracking over time. Family members who notice this change and encourage medical assessment are acting on one of the earliest signals that the brain may need attention.
Conclusion
Losing interest in hobbies and activities you once loved can indeed be a dementia warning sign—one that appears in the majority of dementia cases and may show up years before memory loss becomes obvious. The key is distinguishing between normal life changes, depression or other treatable conditions, and potential neurological decline. When this loss of interest is unexplained, progressive across multiple activities, and combined with other subtle cognitive or behavioral changes, it warrants medical evaluation and close family observation over time.
If you recognize this pattern in yourself or someone you care for, take it seriously enough to seek professional evaluation, but not so seriously that you assume dementia is inevitable. Document what you observe, describe it clearly to doctors, and participate in follow-up testing if recommended. Early recognition of apathy—one of dementia’s most common and earliest symptoms—offers the best opportunity for understanding what’s happening and planning appropriately for the future.
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For more, see NIH MedlinePlus — cognitive testing.
