ISSA Trainer Practice Exam 2026 – The All-in-One Guide for Comprehensive Certification Success!

A common characteristic of arthritis is decreased flexibility. This condition involves inflammation of the joints, which can lead to stiffness and reduced movement. As the joint tissues become inflamed and damaged, the ability of the joints to move freely diminishes, resulting in a lack of flexibility. Individuals with arthritis often experience pain and stiffness especially after periods of inactivity or in the morning upon waking, which further contributes to reduced flexibility in affected joints.

In contrast, increased muscle mass, improved joint range of motion, and increased bone density are not typical characteristics associated with arthritis. Increased muscle mass may be a result of physical training rather than a symptom of arthritis. Improved joint range of motion typically indicates healthy joint function, which is compromised in those with arthritis. Lastly, increased bone density is not a characteristic of arthritis; rather, individuals with certain types of arthritis may actually experience bone weakening over time.