Biomechanics Flashcards
(42 cards)
If a muscle fails to overcome and opposing force what will it do
Shorten
What is the order of muscle contraction during a stretch shortening cycle
Eccentric, isometric, concentric
In the phase of the up in the push up the elbow joint extends how does the tricep react
Concentrically
If the agonist muscle contracts in a movement what will it be
Concentric contraction
What are fixators
Muscles which contract to study the position of a bone
Ie. Fix it to a bone
Why do antagonist muscles contract
To control movement
When doing an upwards jump the contraction of the gastrognemius causes what of the ankle
Plantarflex is the ankle
What does Lombards paradox mean
The cocontraction of the hamstrings and quadriceps
During a pull up the lattisimus Dorsi helps produce what shoulder movement
Extension
What does musculoskeletal analysis take into account
Gravity, body position, external resistance
What does Adduction mean
Towards the anatomical position in the frontal plane
In a vertical jump what does the Knee do
Flex and extend
If the muscle produces a force equal to opposing forces what does it do
Stay the same length
What type of contraction of the skeletal muscle contraction
Internal Force
What are muscles assist primary movers called
Synergists
When landing from a jump why does the gastrocnemius contract
Contracts the dorsiflexion
What is the angle at the knee at the local joint
180°
There are two segment to find the knee angle what are they
The shank and thigh
If there has been a reduction in the knee angle at the local joint reference what has taken place
Flexion
What are the two aims of biomechanics
Reducing injury and enhancing performance
At instantaneous velocity the time interval should be
Very small
What is step length measured and
M
What is step frequency measured in
Hz
How do you reduce the peak vertical ground reaction
Increased the knee flexion when landing
