Jumping

Question 1

Effect of slow or fast stretch shortening cycle on range of movement?

Answer 1

Slow SSC (>250 ms) has larger ROM at joints

Fast SSC (<250 ms) has small ROM at joints

Question 2

What is the series elastic component (SEC)?

Answer 2

When stretched, stores elastic energy the increases the force produced

Question 3

What is The contractile component (CC)?

Answer 3

Is the primary source of muscle force during concentric

muscle action

Question 4

What is the stretch reflex?

Answer 4

When muscle spindles are stimulated the stretch reflex is stimulated, sending input to the spinal cord via type Ia nerve fibres.

Neurons in the spinal cord, impulse travels to the agonist causing a reflexive muscle action.

Question 5

Musculotendinous Unit

Answer 5

Elastic energy in tendons and muscles is increased with a rapid stretch.

Question 6

Relationship between CMJ and Sprinting?

Answer 6

CMJ and 30m sprint performance are significantly correlated

R= -0.60

Question 7

CMJ: Key Phases

Answer 7

Quiet Stance
Start of jump
Contact Phase
Take off
Time in air
Landing

Question 8

What sports had highest CMJ and SJ scores?

Answer 8

Male Elite weightlifters

Question 9

Jump and reach, effect of including arm swing?

Answer 9

inclusion of arm swing can yield an extra 10-15% more height.

Question 10

Practical implications of improving performances?

Answer 10

Improve leg strength/power
improve arm strength/power
segmental co-ordination

Question 11

Key joints in jumping?

Answer 11

Knee extensors
Ankle plantar flexors
Hip extensors

Question 12

Key Muscles in jumping?

Answer 12

Vastus Lateralis
Rectus Femoris
Gastrocnemius
Gluteus maximums