Looked in the mirror lately only to find a few more wrinkles and gray hairs? Those are just a few of the changes you’re likely to notice as you get older. But what exactly is going on with your body? Here’s a list of the natural changes you can expect as you age. Over time, your heart muscle becomes less efficient, working harder to pump the same amount of blood through your body. In addition, your blood vessels lose elasticity. Hardened fatty deposits may form on the inner walls of your arteries (atherosclerosis), narrowing the vessels. The natural loss of elasticity, in combination with atherosclerosis, makes your arteries stiffer, causing your heart to work even harder to pump blood through them. This can lead to high blood pressure (hypertension).

Your bones reach their maximum mass between ages 25 and 35. As you age, your bones shrink in size and density. One consequence is that you might become shorter. Gradual loss of density weakens your bones and makes them more susceptible to fracture. Muscles, tendons and joints generally lose some strength and flexibility as you age.
Swallowing and the motions that automatically move digested food through your intestines slow down as you get older. The amount of surface area within your intestines diminishes slightly. The flow of secretions from your stomach, liver, pancreas and small intestine may decrease. These changes generally don’t disrupt your digestive process, so you may never notice them. But you might notice more constipation.

With age, your kidneys become less efficient in removing waste from your bloodstream. Chronic conditions such as diabetes or high blood pressure and some medications can damage your kidneys further.

About one in 10 people age 65 and older has experienced a loss of bladder control (urinary incontinence). Incontinence can be caused by a number of health problems, such as obesity, frequent constipation and chronic cough.

Women are more likely than men to have incontinence. Women who’ve been through menopause might experience stress incontinence as the muscles around the opening of the bladder (sphincter muscles) lose strength and bladder reflexes change. As estrogen levels decline, the tissue lining the tube through which urine passes (urethra) becomes thinner. Pelvic muscles become weaker, reducing bladder support.

In older men, incontinence is sometimes caused by an enlarged prostate, which can block the urethra. This makes it difficult to empty your bladder and can cause small amounts of urine to leak.

The number of cells (neurons) in your brain decreases with age, and your memory becomes less efficient. However, in some areas of your brain, the number of connections between the cells increases, perhaps helping to compensate for the aging neurons and maintain brain function. Your reflexes tend to become slower. You also tend to become less coordinated and may have difficulty with balance.

With age, your eyes are less able to produce tears, your retinas thin, and your lenses gradually turn yellow and become less clear. In your 40s, focusing on objects that are close up may become more difficult. Later, the colored portions of your eyes (irises) stiffen, making your pupils less responsive. This can make it more difficult to adapt to different levels of light. Other changes to your lenses can make you sensitive to glare, which presents a problem when driving at night. Common conditions that affect aging eyes include cataracts, glaucoma and macular degeneration.

Hearing loss is one of the most common conditions affecting adults who are middle-aged and older. About half of all people older than age 85 experience hearing loss. Over the years, noises can damage the sensory hair cells of your inner ears.

Also, the walls of your auditory canals thin, and your eardrums thicken. You may have difficulty hearing high frequencies. Some people find it difficult to follow a conversation in a crowded room. Changes in the inner ear or in the nerves attached to it, earwax buildup and various diseases can all affect your hearing.

How your teeth and gums respond to age depends on how well you’ve cared for them over the years. But even if you’re meticulous about brushing and flossing, you may notice that your mouth feels drier and your gums have pulled back (receded). Your teeth may darken slightly and become more brittle and easier to break.

Most adults can keep their natural teeth throughout their lives. But with less saliva to wash away bacteria, your teeth and gums become slightly more vulnerable to decay and infection. If you’ve lost most or all of your natural teeth, you might use dentures or dental implants as a replacement.

Some older adults experience dry mouth (xerostomia), which can lead to tooth decay and infection. Dry mouth can also make speaking, swallowing and tasting difficult. Oral cancer is more common among older adults. Your dentist checks for oral cancer when you go for regular cleanings and checkups.

With age, your skin thins and becomes less elastic and more fragile. You’ll likely notice that you bruise more easily. Decreased production of natural oils may make your skin drier and more wrinkled. Age spots can occur, and small growths called skin tags are more common. Your nails grow at about half the pace they once did. Your hair may gray and thin. In addition, you likely perspire less — making it harder to stay cool in high temperatures and putting you at increased risk of heat exhaustion and heat stroke.

How fast your skin ages depends on many factors. The most significant factor is sun exposure over the years. The more sun your skin has been exposed to, the more damaged it may be. Smoking adds to skin damage, such as wrinkles. Skin cancer also is a concern. Your risk of skin cancer increases as you age.

Sleep needs change little throughout adulthood. If you need six hours of sleep nightly, chances are you’ll always need six hours — give or take 30 minutes. However, as you age, you’ll likely find that you sleep less soundly, meaning you’ll need to spend more time in bed to get the same amount of sleep. By age 75, some people wake up several times each night.

As you age, maintaining a healthy weight — or losing weight if you’re overweight — may be more difficult. Your metabolism generally slows, meaning that your body burns fewer calories. Calories that were once used to meet your daily energy needs instead are stored as fat. Your level of activity may decrease, resulting in unwanted weight gain.

With age, sexual needs, patterns and performance may change. Women’s vaginas tend to shrink and narrow, and the walls become less elastic. Vaginal dryness is a problem. All of this can make sex painful.
Impotence becomes more common in men as they age. By age 65, as many as one in four men has difficulty getting or keeping an erection. In others, it may take longer to get an erection, and it may not be as firm as it used to be.

If you think you’ve already done too much damage to yourself to hope for a long life, think again. Researchers say it’s never too late to adopt a healthy lifestyle. For example, if you quit smoking now, your risk of heart disease begins to fall almost immediately.
Living a healthy lifestyle can improve how you age. Try the following:

  • Stop smoking.
  • Eat a healthy diet full of fruits, vegetables and whole grains.
  • Exercise for at least 30 minutes most days of the week.
  • Maintain a healthy weight.
  • Get enough sleep so that you wake feeling rested.
  • Follow your doctor’s guidance for checkups and health screenings.