Most of the age-related changes are gradual. Some begin in early adulthood, while other changes do not appear until late adulthood. While some signs of old age are visible, such as graying hair, numerous others are not visible. These include changes to the internal organs, which are measured by functional capacity. Age-related changes do not necessarily imply that one's quality of life has diminished. Age-related physical changes vary greatly between individuals as such changes are dependent on heredity, lifestyle, and nutrition.

With in-text citations in correspondences with 4-5 scholarly references,

1. Consider the impact of biological factors versus lifestyle on declines in physiological functions such as musculoskeletal and cardiovascular.
2. Provide in vast details how can lifestyle changes reverse or alleviate some of the declines of physiological functions. Discuss at least one decline of musculoskeletal along with the result of the change and one decline of cardiovascular along with the result of the change.

Most importantly, please, your successful discussion should demonstrate a comprehension of the assigned reading material,Hooyman, N., Kawamoto, K., & Kiyak, H. (2015). Aging Matters: An Introduction to Social Gerontology. Upper Saddle River, New Jersey: Pearson. Belmont, CA: Thomson. ISBN 10:0205727646; ISBN 13: 9780205727643.

Please, remember to use other 3-5 scholarly references alongside in-text citations aside the above assigned reading material (Hooyman).