Flexibility Matters Even More as You Age

Flexibility is often treated as a general idea of being loose or mobile. A clearer way to understand it is to separate three questions: what flexibility means, how stretching relates to joint range of motion (ROM), and why that range can matter with advancing age.

In the current ACSM model, flexibility is one of five interconnected components of physical fitness. It refers to the ability to move a joint through its available, unrestricted range of motion without pain. Flexibility is also joint-specific, so having a large range of motion at one joint does not necessarily mean the same is true elsewhere in the body .^1,3

Stretching can increase joint range of motion, particularly when it is performed regularly over time. The size of that change can vary with the joint, stretching method, and characteristics of the individual .^1,2

Range of motion also has an age-related context. Range of motion tends to decrease with advancing age, although the amount of change varies considerably among joints and movements. As a result, age-related changes in flexibility are better understood joint by joint rather than as a uniform loss throughout the body .^1,3

The practical importance becomes clearer when ROM is markedly limited. Everyday tasks that require a particular joint movement can become more difficult when the necessary range is restricted. That does not mean flexibility alone determines whether someone can perform daily activities. Markedly limited ROM is better understood as one possible contributor to difficulty when a task requires movement that is hard to access .¹

For older adults, adequate joint range of motion may help support physical function when everyday tasks require that range. Flexibility is only one part of physical function, however, alongside factors such as strength, balance, coordination, and endurance. Increasing flexibility by itself does not guarantee an improvement in overall functional ability .^1,4

More flexibility is not automatically better, especially when a person already has enough range for the movements they need to perform. What matters is whether the available motion allows the body to carry out relevant tasks comfortably and effectively. With age, the useful goal is therefore not necessarily to maximize range of motion, but to preserve enough movement where it matters.