The amount of blood in a human body varies, depending on factors such as age, sex, overall health and even where a person lives. For example, men tend to have more blood than women of comparable size and weight.
Be as Active as Possible. Regular physical activity and exercise are important to the physical and mental health of almost everyone, including older adults.Staying physically active and exercising regularly can produce long-term health benefits and even improve health for some older people who already have diseases and disabilities.tudies have shown that exercise provides many health benefits and that older adults can gain a lot by staying physically active. Even moderate exercise and physical activity can improve the health of people who are frail or who have diseases that accompany aging.
1 Less than 5% of adults participate in 30 minutes of physical activity each day; only one in three adults receive the recommended amount of physical activity each week. 2  Only 35 â 44% of adults 75 years or older are physically active, and 28-34% of adults ages 65-74 are physically active. The least likely were Delaware (46.5%), West Virginia (47.1%) and Alabama (47.5%). 2  The national average for regular exercise is 51.6%. 3  Children now spend more than seven and a half hours a day in front of a screen (e.g., TV, videogames, computer).