Flexibility Flashcards
Flexibility
ability to move the joints through their full ROM. depends on joint structure, length and elasticity of connective tissue, and nervous system activity
Agonist
muscle in state of contraction, opposed by the antagonist muscle
Antagonist
muscle that opposes the action of another muscle
True ROM
ROM that is observed at a specific joint and isolated to that specific joint. we want true ROM during flexibility and resistance training
Apparent ROM
ROM that is observed at a specific joint but is not isolated to that joint, rather the motion involves movement within other joints in the kinematic chain
Benefits of flexibility and stretching (11)
increased
improved
improved
joint
prevention
maintenance
relief
relief
relax
improved
injury
- increased ROM
- improved performance
- improved quality of life, especially for those aging
- joint health
- prevention of lower-back pain and injuries
- maintenance of good posture and balance
- relief of aches and pains
- relief of muscle cramps
- relaxation
- improved impaired mobility
- injury prevention
factors affecting flexibility (6)
- Bone structure
- Tissue
- Muscle tissue
- Tendons and ligaments
- Proprioceptors
- Age
Bone structure
joint type
- hinge (limited ROM, flexion/extension)
- ball and socket (extensive ROM, flexion extension circumduction ext/int rotation abduction adduction
soft tissue
anything that cause shortening of soft tissues will decrease ROM
examples:
- injuries, change elasticity
- improper training techniques, training through limited ROM
- sedentary life, results in shortening of muscles and ligaments
- poor posture
soft tissues
what does excessive muscle and fat mass do to ROM?
decreases ROM
soft tissues
what does lengthening of soft tissues do to ROM?
what is an example of lengthening soft tissues
- increase ROM
- Regular stretching! this will elicit lengthening muscles and connective tissues
How does age affect flexibility?
fibrosis! fiber degeneration:( but regular stretching can combat most of this, Fibrosis = decrease ROM
flexibility and sex?
in some joints females tend to have greater ROM than males
pregnant client flexibly caution
For pregnant women, their ligaments are being prepared to be more ready to lengthen, that means we DONT want for them to be aggressively stretching
Proprioceptors (2)
- muscle spindles
- Golgi tendon organ
Muscle spindles!
proprioceptors that run PARALLEL to muscle fibers, monitoring the amount and rate of change in muscle length
- They are VERY SENSITIVE TO FAST STRETCHES
what happens during rapid stretching movements?
muscle spindles cause a stretch reflex! that means the stretched muscle contracts as the antagonist muscle relaxes. this is to protect the muscles from tearing! thanks muscle spindles
how can we achieve a greater stretch?
by not activating the muscle spindles! SLOW and CONTROLLED MOVEMENTS to achieve a greater stretch
Golgi Tendon organs
mechanoreceptors found near the musculotendinous junction. Sensitive to INCREASES in MUSCULAR TENSION… why? because increase in muscle tension causes that muscle to reflexively relax (decreasing tension)
(GTO)
Reciprocal inhibition
relaxation in the muscle opposing the muscle experiencing increased tension, thereby limiting further movement and increases in tension
(GTO)
Autogenic inhibition (used in PNF stretching)
actively contract a muscle immediately before stretching it, we experience greater relaxation in the muscle
How is flexibility improved? (4)
- increased extensibility of connective tissue
- decreased muscular tension RESULTING IN MUSCULAR RELAXATION
- increased coordination of body segments
- strengthening of the agonist!
80% of Canadians suffer from low-back pain, how is this caused?
low back pain is caused by muscle imbalances between the abs and posterior spinal muscles, this results in poor spinal alignment that puts pressure on nerves.
what can help with low back pain?
strength and flexibility in the back, pelvis and thighs may help to prevent low back pain
- good hip and knee flexibility protect the spine from excessive motion during daily living activities