“Mobility” and “flexibility” often get used interchangeably, but they aren't quite the same thing, and understanding the difference helps make sense of what research on stretching actually shows.
Flexibility vs. Mobility
Flexibility generally refers to the passive range of motion available at a joint — how far it can move when something else is doing the moving. Mobility is broader: the ability to actively move a joint through that range, under your own control. In practice, mobility depends on both flexibility and strength working together.
What Studies Generally Agree On
- Regular stretching can increase range of motion over time, particularly with consistent practice.
- Static stretching (holding a position) tends to be more associated with flexibility gains, especially when done after activity, when muscles are warm.
- Dynamic stretching (moving through a range) is generally better suited to warming up before activity than to building long-term flexibility.
Where the Research Is Still Mixed
Claims that stretching prevents injuries, reduces muscle soreness, or directly improves athletic performance are less settled. Some studies find modest links; others find little to no effect. This is an area where the honest answer is genuinely “it depends,” and it's worth being skeptical of any source that states these outcomes as settled fact.
The Practical Takeaway for Golfers
Because a golf swing depends on both range of motion and the strength to control it, a combination of consistent mobility work and general fitness tends to matter more than stretching in isolation. Assisted stretching can be one useful part of that — not a standalone fix.
Mobility is range of motion plus the strength to control it. Stretching supports one half of that equation.
Sources: Mayo Clinic; National Institutes of Health, PMC, “Current Concepts in Muscle Stretching for Exercise and Rehabilitation.”