What is Functional Range Systems (FRS)?

Functional Range Systems is a comprehensive movement and mobility system developed by Dr. Andreo Spina. It encompasses multiple components such as:

●     FRC® (Functional Range Conditioning) – Focuses on improving mobility, joint strength, and control.

●     FR® (Functional Range Release) – A soft tissue management system using manual therapy techniques.

●     FRA® (Functional Range Assessment) – A detailed joint-by-joint movement assessment to guide training or therapy.

At its core, FRS isn’t just about passive stretching or temporary fixes—it’s about actively training your joints to be stronger, more resilient, and more adaptable through controlled, progressive inputs.

How FRS Improves Joint Mobility

Mobility isn’t just about how far a joint can move—it’s about how much usable control you have within that range. FRS trains your body to expand and control that range of motion using principles like:

●     Controlled Articular Rotations (CARs): Daily joint rotations that maintain and assess joint health.

●     Progressive & Regressive Angular Isometrics (PAILs/RAILs): Techniques that expand mobility by training tissues at their end ranges.

●     End-Range Strengthening: Building strength and control at the most vulnerable parts of your joint’s range to make them more resilient.

By consistently applying these tools, FRS builds usable, active mobility—the kind that transfers into real-world movement, sports performance, and pain-free daily living.

How FRS Helps Prevent Injury

Most injuries occur when a joint is forced into a position it’s not prepared for—either too fast, too far, or under too much load. FRS helps prevent this by:

●     Expanding your active range of motion – so you're less likely to get injured when pushed into end-range positions.

●     Strengthening connective tissues – like tendons, ligaments, and joint capsules, making them more resilient.

●     Improving neuromuscular control – giving your brain better control over how your body moves, even in unpredictable situations.

By improving both capacity and control, FRS creates a buffer zone around your joints—allowing you to move more freely without straining tissues.

Who is FRS For?

●     Athletes who want to optimize performance and reduce injury risk

●     Rehab patients recovering from injury or surgery

●     Desk workers dealing with stiff hips, shoulders, or backs

●     Fitness professionals who want to add mobility and joint care into training

●     Anyone who wants to move better for longer