Everyone has the occasional "senior moment." Maybe you've gone into the kitchen and can't remember why, or can't recall a familiar name during a conversation. Memory lapses can occur at any age, but aging alone is generally not a cause of cognitive decline. When significant memory loss occurs among older people, it is generally not due to aging but to organic disorders, brain injury, or neurological illness.
Studies have shown that you can help prevent cognitive decline and reduce the risk of dementia with some basic good health habits: staying physically active, getting enough sleep, not smoking, having good social connections, limiting alcohol to one drink a day, and eating a balanced diet low in saturated and trans fats. Certain health conditions that can impair cognitive skills include diabetes, high blood pressure, sleep apnea, depression, hypothyroidism, and high LDL (bad) cholesterol. If you have any of these health issues, you can help protect your memory by following your doctor's advice carefully.
Memory changes can be frustrating, but the good news is that, thanks to decades of research, there are various strategies we can use to protect and sharpen our minds. Here are several you might try.
1. Keep learning
A higher level of education is associated with better mental functioning in old age. Experts think that advanced education may help keep memory strong by getting a person into the habit of being mentally active. Challenging your brain with mental exercise is believed to activate processes that help maintain individual brain cells and stimulate communication among them. Many people have jobs that keep them mentally active, but pursuing a hobby, learning a new skill, or volunteering for a project at work that involves a skill you don't usually use can function the same way.
2. Use all your senses
The more senses you use in learning something, the more of your brain will be involved in retaining the memory. In one study, adults were shown a series of emotionally neutral images, each presented along with a smell. They were not asked to remember what they saw. Later, they were shown a set of images, this time without odors, and asked to indicate which they'd seen before. They had excellent recall for all odor-paired pictures, and especially for those associated with pleasant smells. Brain imaging indicated that the piriform cortex, the main odor-processing region of the brain, became active when people saw objects originally paired with odors, even though the smells were no longer present and the subjects hadn't tried to remember them. So challenge all your senses as you venture into the unfamiliar.
3. Believe in yourself
Myths about aging can contribute to a failing memory. Middle-aged and older learners do worse on memory tasks when they're exposed to negative stereotypes about aging and memory, and better when the messages are positive about memory preservation into old age. People who believe that they are not in control of their memory function — joking about "senior moments" too often, perhaps — are less likely to work at maintaining or improving their memory skills and therefore are more likely to experience cognitive decline. If you believe you can improve and you translate that belief into practice, you have a better chance of keeping your mind sharp.
4. Prioritize your brain use
If you don't need to use mental energy remembering where you laid your keys or the time of your granddaughter's birthday party, you'll be better able to concentrate on learning and remembering new and important things. Take advantage of calendars and planners, maps, shopping lists, file folders, and address books to keep routine information accessible. Designate a place at home for your glasses, purse, keys, and other items you use often.
5. Repeat what you want to know
When you want to remember something you've just heard, read, or thought about, repeat it out loud or write it down. That way, you reinforce the memory or connection. For example, if you've just been told someone's name, use it when you speak with him or her: "So, John, where did you meet Camille?"
6. Space it out
Repetition is most potent as a learning tool when it's properly timed. It's best not to repeat something many times in a short period, as if you were cramming for an exam. Instead, re-study the essentials after increasingly longer periods of time — once an hour, then every few hours, then every day. Spacing out periods of study is particularly valuable when you are trying to master complicated information, such as the details of a new work assignment.
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Q. I am a healthy, active 39-year-old guy. I enjoy a beer with dinner most nights, and a six-pack most weekends. Over the past year or two, I've had to let my belt out, and now I'm letting out my pants. So here's my question: is beer really responsible for my "beer belly"?
A. Whether it's called a beer belly, a spare tire, the apple shape, or the middle-age spread, abdominal obesity is the shape of risk. Abdominal obesity is a health hazard, increasing the risk of heart attack, stroke, diabetes, erectile dysfunction, and other woes. Risk begins to mount at a waist size above 37 inches for men, and a measurement above 40 inches would put you in the danger zone. For women, the corresponding waist sizes are 31½ and 35 inches, respectively.
Despite the name, beer is not specifically responsible for the beer belly. Research from the Czech Republic tells the tale. In a study of nearly 2,000 adults, beer consumption was not related to girth.
If it's not beer, what is to blame? The culprit is calories; if you take in more calories with food and drink than you burn up with exercise, you'll store the excess energy in fat cells. And unfortunately for men, their abdominal fat cells seem to enlarge more readily than the abdominal fat cells in women.
But although beer is not a special problem, it can add to abdominal obesity by contributing calories. In round numbers, a standard 12-ounce beer contains about 150 calories; a light beer, about 110 calories. For comparison, a 5½-ounce glass of wine or a 1½-ounce shot of hard liquor provides about 100 calories. Since all these beverages contain approximately the same amount of alcohol, you can see that regular beer does have extra calories over other adult beverages — unless you count the mixers and olives.
— Harvey B. Simon, M.D.
Harvard Medical School