Kenny Croxdale
Level 7 Valued Member
Stretching - Before, After...or Never? : 55 Min Phys
Cliff Notes Of Video
Below are the Cliff Notes on the video with more information.
Dynamic Stretch
1) Pro
Increase Nerve, Muscle and Connective Tissue
(Better Performance)
2) Con
Won't Improve ROM/Mobility
Static Stretch
1) Pro
Improves ROM/Mobility
(Acute and Chronic)
2) Con
Fatigue (Dissipates Kinetic Energy) from Nerves, Muscle Spindles, Muscle and Connective Tissue. (Worse Performance)
Proprioception
Muscle Spindles
Sensory Organs sense Muscle Stretch.
When Muscle is Stretch, Muscle Spindles tell the Muscles to Contract Back.
Magnitude of Contraction Back is dependent on Hard and Quickly it is Stretched.
Golgi Tendon Organ, GTO
Senses Tension and tells the Muscles to stop contracting.
GTO causes Muscle Relaxation; shuts down Contraction.
Kenny's Side Note
Think of the GTO as a Circuit Breaker at your house.
It detects when too much current is coming it than it can handle.
When that occurs, the Circuit Breaker is tripped, turing off the electricity so you don't burn down you house.
The GTO functions the same way. If it preceives too more tension is being placed on the tendons than it can handle, it shut down the Muscle Contraction. It is a build in safety mechanism.
Rewiring You Circuit
Let's say your circuit is 15 amp and the device you have requires 20 amps. You can rewire the circuit to handle 20 amps.
The GTO can be "Rewired" to handle more tension, by gradually increasing the weight in a movement.
PNF (Proprioceptive Neuromuscular Facilitation) Stretching
1) Reciprocal Inhibition
Flex Quads Hard = More Hamstring Range of Motion because Muscle Spindles in the Hamstring Turn Off.
2) Autogenic Inhibition
Stretch Hamstring hard, relax and then stretch farther (PNF).because GTO kicks in and further inhibits Muscle Spindles Hamstrings.
Cliff Notes Of Video
Below are the Cliff Notes on the video with more information.
Dynamic Stretch
1) Pro
Increase Nerve, Muscle and Connective Tissue
(Better Performance)
2) Con
Won't Improve ROM/Mobility
Static Stretch
1) Pro
Improves ROM/Mobility
(Acute and Chronic)
2) Con
Fatigue (Dissipates Kinetic Energy) from Nerves, Muscle Spindles, Muscle and Connective Tissue. (Worse Performance)
Proprioception
Muscle Spindles
Sensory Organs sense Muscle Stretch.
When Muscle is Stretch, Muscle Spindles tell the Muscles to Contract Back.
Magnitude of Contraction Back is dependent on Hard and Quickly it is Stretched.
Golgi Tendon Organ, GTO
Senses Tension and tells the Muscles to stop contracting.
GTO causes Muscle Relaxation; shuts down Contraction.
Kenny's Side Note
Think of the GTO as a Circuit Breaker at your house.
It detects when too much current is coming it than it can handle.
When that occurs, the Circuit Breaker is tripped, turing off the electricity so you don't burn down you house.
The GTO functions the same way. If it preceives too more tension is being placed on the tendons than it can handle, it shut down the Muscle Contraction. It is a build in safety mechanism.
Rewiring You Circuit
Let's say your circuit is 15 amp and the device you have requires 20 amps. You can rewire the circuit to handle 20 amps.
The GTO can be "Rewired" to handle more tension, by gradually increasing the weight in a movement.
PNF (Proprioceptive Neuromuscular Facilitation) Stretching
1) Reciprocal Inhibition
Flex Quads Hard = More Hamstring Range of Motion because Muscle Spindles in the Hamstring Turn Off.
2) Autogenic Inhibition
Stretch Hamstring hard, relax and then stretch farther (PNF).because GTO kicks in and further inhibits Muscle Spindles Hamstrings.
