Motor Fitness Flashcards
Name a long term adaption to resistance exercise ?
The adaption is gaining more motor units
This adaption will generate increased force and strength of contraction
What can improve motor fitness ?
Exercise can as it enhances neuromuscular connections
Why do trained people have more motor units
Because there muscles and connective tissue strengthen in response to training.
Name the three muscle sense organs
Joint receptors
Golgi tendon
Muscle spindles
What is a joint receptor?
Found in ligaments
Inform brain about the position of the joint
What is muscle spindles
Found in muscle
Inform brain about how stretched or lengthened the muscle is
Golgi tendon organs
Found in tendons
Tell brain how much force been generated in muscle
What is the origin
Attached to fixed bones or bone
Doesn’t move during body movements
Promixal attachment I.e one nearest to centre of body
More than one origin Eg quadriceps(4) triceps (3) bicep(2)
What is insertion
- Moves during contraction called the insertion
- Distal attachments ie the one furthest away drop centre midline
- Have a single insertion
Name the 4 muscle movements
Isotonic
Isometric
Isokinetic
Stretching
Describe isotonic
Concentric - which generates force and shortens
Origin and insertion move closer together.
Lifting phrase e.g curl up
Eccentric- which generates force and lengethens
Origin and insertion move further apart
Lowering phase downward phase of a curl up
What is isometric?
Generates force and stays same length
What is isokinetic
Muscle action involve movement at a contrast speed
What happens with the term stretching
Muscles lengthen and relax
They move further apart
