There are two theories as to why people age. One theory posits that aging is naturally programmed into the body. The second theory is that aging is the result of damage that has accumulated during life, which is why some people live longer than others.Know More
Everyone ages differently, and scientists believe that the rate at which someone ages comes down to four main things: chemistry, behavior, physiology and genetics. Studies have proven that when scientists adjust the genes in yeast cells, mice and other organisms, the life span of those creatures can be nearly doubled. It is believed that genetics makes up about 35 percent of a person's aging process.
Even with good genes, the body continues to undergo chemical changes throughout its life. Some of these changes cause damage to the body and are factors in the aging process. DNA repair, hormones, heat shock proteins and free radicals are all important concepts when looking at the biochemistry of aging.
As a person ages, certain organs in the body change. This includes the heart, which thickens over time. This thickening is due to a thickening of arteries. This gives the heart a much lower maximum pumping rate. As the immune system ages, it takes longer to replenish T cells. As a result, older people take longer to get over being sick.Learn more about Older Adults
Lifetime sports are physical activities that can be performed at any age, explains About.com. Lifetime sports are low-impact and low-risk activities, and they do not involve physical contact with other players. These activities promote fitness and improve health at any age.Full Answer >
In a normal, healthy adult, the resting pulse rate does not change much with age. Age does change the heart's ability to adjust to body activity; however, so it may take longer to get the heart pumping faster or slower during and after exercise. Normal pulse rate varies by person.Full Answer >
Male menopause, more correctly called androgen decline or "andropause," consists of a gradually decreasing testosterone level from about age 30 through the end of life, according to the Mayo Clinic. Resulting symptoms, mimic menopause in women and include fatigue, decreased muscle mass, depression and sexual problems.Full Answer >
Loss of balance with age is common and has a variety of possible causes, including hearing loss, eye problems, blood pressure, arthritis and other muscular ailment. The result of aging usually triggers the onset of these symptoms and create balance problems.Full Answer >