Exam (elaborations)
KNES 320 FINAL QUESTIONS WITH CORRECT ANSWERS.
- Course
- KNES
- Institution
- Liberty University
KNES 320 FINAL QUESTIONS WITH CORRECT ANSWERS.
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KNES 320 FINAL QUESTIONS WITH CORRECTANSWERS
Reciprical inhibition as applied to plyometrics: Correct Answer-Utilizes
the stretch reflex to generate maximum tension in the eccentric
contraction with relative relaxation of the opposing muscle group.
When does co-contraction of agonist and antagonist muscle groups
occur? Correct Answer-When heights of plyometric boxes are too high
or loads are too great when using plyometrics.
In untrained athletes.
When attempting to elicit the stretch shortening cycle while
weightlifting, why is it important to use a weight that is not too light?
Correct Answer-Because the weight will not elicit the stretch shortening
cycle.
When in human movement is the stretch reflex elicited? Correct
Answer-The stretch reflex is incorporated in all explosive plyometric
exercises, especially those that involve the extensor muscles, which
usually contain a greater proportion of fast twitch muscles.
How do you get the most out of the stretch reflex? Correct Answer-
Explosive plyometrics should be done at the beginning of training.
With a rested neuro-muscular system.
After a vigorous warm-up
Stop when fatigue sets in.
,Why should plyometrics not be done under conditions of fatigue?
Correct Answer-The less resiliency the muscle has the more prone to
injury
The greater the muscular tension produced, potentially, the greater the
muscular power produced.
Define plyometrics: Correct Answer-Exercises that enable a muscle to
reach maximum strength in as short a time as possible.
Elicits the involuntary forced stretch during which you accumulate
energy for return action.
How do you determine readiness for explosive training? Correct
Answer-Adequate strength base
Good technique: how to jump and land
True or False. To yield the greatest results plyometrics should be done in
conjunction with strength training. Correct Answer-True.
True or False: You must continue to develop additional strength that can
be used for improving explosive power. Correct Answer-True.
Which of the following involves the CNS to a higher extent: Jump
Training or Plyometrics? Correct Answer-Plyometrics.
,Too many depth jumps will result in which of the following? Correct
Answer-Disruption of the nervous system
Increased likelihood of injury
Irritability
Interference of sleep patterns
Why is box height a major consideration in the development of a depth
jump program? Correct Answer-Boxes that are too low will not produce
an overload effect on the muscle jump improvements will be minimal.
If boxes are too high, the athlete will have to absorb much impact that he
will lose all rebound effect from the landing.
Stretch shortening cycle: the combination of eccentric and concentric
contractions results from the integrated functioning of which two muscle
sensors? Name the two muscle sensors and what are their roles? Correct
Answer-Golgi Tendon Organs: sense stretch and cause muscles to relax
Muscle spindle: detects severe or rapid stretch, it sends a message that
returns telling the muscle to contract.
Discuss pre-stretch. Correct Answer-May be innate
Most sports actions use some kind of pre-stretch prior to the movement
Plyometrics are designed to help produce a greater force by causing it to
produce force through a pre-stretch
, Define reciprocal inhibition Correct Answer-When the opposite,
antagonist, muscle does not resist the agonist muscle's contraction
process.
What is a GTO's and what is their role in muscle contraction? Correct
Answer-Sensory mechanism that is defensive in nature by acting to
protect the muscle from literally tearing off the bone
When tension becomes too great, the GTO's send a signal that stops the
movement, or at the very least, slows it down.
Describe how the mechanism of plyometrics works. Correct Answer-
When a muscle undergoes a pre-stretch, it begins to build up energy. If
released promptly, as in the rubber band stretch, this energy will be able
to aid in the contraction of the muscle.
In plyometrics, what happens when the muscle is stretched and held too
long? Correct Answer-It will not produce an explosion effect, and in fact
will make the muscle work even harder to do the same work.
Define power. Correct Answer-A combination of speed and strength that
is crucial to sporting performance.
Discuss the limitations of traditional strength training in comparison to
plyometrics. Correct Answer-Traditional weight room exercises do not
allow the athlete to move at a speed or use the movements needed to
develop sport specific power.
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