The nurse is caring for a client who is 70 years old who complains of increased weakness with daily activities. What statement by the client indicates a correct understanding of age-related changes to the musculoskeletal system that cause this manifestation?

"My bones are getting denser as I age, which makes me use more effort to perform my daily activities."

"My bone cells that build new bone are working faster than my bone resorption, leading to my weakness."

"My muscle strength is decreasing along with my bone density, which requires me to rest more during activities."

"My skin is getting thicker with more collagen, and an increase in my subcutaneous fat is causing stress on my joints."