Final answer:
To live a full healthy life, achieving a fitness rating that corresponds to the HHS guidelines, involving 2.5 hours of moderate or 1.25 hours of vigorous aerobic activity weekly, is ideal. This level of physical activity offers numerous health benefits, contributing to longevity and quality of life.
Step-by-step explanation:
If you achieve a fitness rating that aligns with the U.S. Department of Health and Human Services (HHS) guidelines, you're probably at the level of fitness you need in order to live a full, healthy life. The HHS recommends that adults aged 18 to 64 engage in regular aerobic physical activity for 2.5 hours at moderate intensity, or 1.25 hours at vigorous intensity each week. Engaging in physical activity consistent with these guidelines is associated with a variety of health benefits, such as maintaining physical fitness, healthy weight, and promoting psychological well-being, which can contribute to a full and healthy life.
In the context of evolutionary fitness, an individual's relative fitness is their ability to survive and reproduce relative to the rest of the population. However, when discussing fitness in terms of personal health and well-being, it is often quantifiable through metrics such as exercise duration and intensity that mirror the demands of modern human lifestyles, which require clean air and water, a healthy diet, plenty of physical exercise, and the experience of conviviality.