The physiological and emotional changes that occur with aging. Cells are programmed to die under specific situations, a procedure called apoptosis. It would appear that an interaction between genetics and environment determines the timing and rate of apoptosis. Apoptosis usually is gradual, providing a slow but progressive diminishment of function. The alterations that result become apparent at about midlife (40s and 50s). Additional circumstances shape the changes of aging too, such as diseases and injuries. And as the body�s structure slowly changes, it might be more susceptible to both disease and injury. Normal, observable changes regarding aging include:
� Presbyopia. The eyes gradually lose their ability to accommodate distance in focusing, producing an lack of concentration on close objects. Presbyopia becomes apparent around age 45.
� Decreased lean muscle. Androgens support a male�s muscle mass by increasing protein anabolism (growth) and decreasing protein catabolism (destruction). Androgen levels peak at about age 25, and they slowly decline. Muscles follows suit. Increased unwanted fat often accompanies decreased muscular mass because the body�s metabolism also shifts. Regular physical exercise gets to be more crucial to maintain muscular mass along with muscle strength and tone.
� Modifications to hair growth. Men sometimes joke which the hair on head is relocating with other elements of their bodies, which often definitely seems to be the case although isn�t quite what the results are. Modifications to ANDROGEN levels as well as the ways in which cells reply to androgens cause modifications to growth of hair patterns. Hair for the head often thins, while hair on other regions with the body increases.
� Sexual drive. Changing androgen levels affect a male�s sexual response. It takes longer to formulate tougher erection, and erections after age 45 might not be as firm as each time a man was a student in his 20s. Additionally , it often takes longer to arrive at orgasm in order to recover before creating a second erection.
� Illness and injury. The prospect of medical problems increases as we grow old, since the body gets to be more vunerable to, or actually starts to show the results of, damage. Some damage is internal and cellular, for instance coronary disease. An older man�s body which more susceptible to break from external sources, like muscle strains and brittle bones. There are many social implications in connection with aging. Contemporary culture appears to favor youth, and many men find it difficult to be �old,� however it is because they define it. Nutritious ways of eating, regular physical exercise (aerobic and resistance), moderation, and not smoking are common methods to maintain the body�s health and vigor.