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HHS 231 Chapter 9
Flexibility
| Question | Answer |
|---|---|
| Flexibility | The ability of a joint (or joints) to move through a full range of motion |
| Range of motion | The movement limits of a specific joint or group of joints |
| Stretching | Exercises designed to improve or maintain flexibility |
| Static (passive) flexibility | A joint's range-of-motion limits with an external force applied |
| Dynamic (active) flexibility | A joint's range-of-motion limits with muscular contraction applied |
| Arthritis | An umbrella-term for more than 100 conditions characterized by inflammation of a joint |
| Tendons | Connective tissues attach muscle to bone |
| Joint | The articulation or point of contact between two or more bones |
| Golgi tendon organs | Muscle tension receptors located in tendons that are responsible for triggering muscle relaxation to relieve excessive muscle tension |
| Stretch receptors (muscle spindles) | Muscle length receptors located within muscle fibers that trigger muscle contractions in response to rapid, excessive muscle lengthening |
| Stretch reflex | The reflex contraction of a muscle triggered by stretch receptors (muscle spindles) in response to a rapid overextension of that muscle |
| Collagen | The primary protein of connective tissues throughout the body |
| Static stretching | Stretching characterized by slow and sustained muscle lengthening |
| Dynamic stretching | Stretching characterized by controlled, full range-of-motion movements that mimic exercise session movements |
| Ballistic stretching | Stretching characterized by bouncing, jerky movements and momentum to increase range of motion |
| Proprioceptive neuromuscular facilitation (PNF) | Stretching that's facilitated or enhanced by the voluntary contraction of the targeted muscle group or contraction of opposing muscles |
| Contraindicated | Not recommended |