Final answer:
Age-related changes to the MSK system that may increase falls include decreased bone density and muscle strength.
Step-by-step explanation:
Normal age-related changes to the musculoskeletal (MSK) system that may increase falls include decreased bone density and muscle strength.
As people age, their bone density decreases, making bones more fragile and susceptible to fractures. Additionally, muscle strength tends to decline, decreasing stability and balance, which can lead to falls.
Other changes such as decreased joint flexibility and enhanced balance and coordination may not necessarily increase falls, but rather help to prevent falls and maintain mobility.