Speed and Agility Flashcards
(39 cards)
Define linear speed
Move in one direction as fast as possible
What is linear speed a product of
Stride length x stride rate
What is optimal stride length
2.3/2.5 x leg length
Roughly how many steps do elite sprinters take per 100 metres
45 (Bolt 40)
What % of time do elite spinners spend in the air
60%
What type of strength is used in 0-10m (acceleration)
Concentric
Describe gluteus maximus’ role in spritning
Stores elastic energy in hip flexion, released in stance phase and hip extension
Describe the hamstring’s role in sprinting
Stores elastic energy in hip flexion, released in stance phase
Describe role of the quadriceps in sprinting
Shock absorbers in stance, knee extensors
Describe the calf’s role in sprinting
Shock absorbers and deliver peak in early stance phase
How might plyometrics help improve sprint performance?
Sprinting involves both CON and ECC work
The SSC helps generate muscle force used in sprinting
Muscle flexibility/ability to lengthen easily in hip and knee extensors/flexors is vital in sprinting
How much sprint improvement is seen when using plyometric training?
5-10%
Are speed gains seen from plyometric training more profound in trained or untrained?
Untrained
What part of a sprint does heavy and slow bar speeds enhance?
Acceleration (start of the sprint)
What part of a sprint does slower and quick bar speeds enhance?
Rate of force development
How much sprint improvement can be seen when using resistance training?
2-10%
Why might mobility training help sprint performance?
- Imbalance in strength and flexibility of muscles involved causes limited motion
- Limited motion reduces; force output and speed of movement
What body parts need to be flexible for a sprinter?
Hip and ankle for the acceleration phase
How does enhanced movement technique improve sprint performance?
Good technique allows biomechanically advantageous position
What are the benefits of overspeed training?
Improved stride frequency
Exposure to higher speeds
Allows supramaximal speed
How much faster should overspeed training be?
No more than 10% faster than normal speed due to loss of technique
What are the benefits of resisted speed training?
Force development enhanced
Improves stride length
What distance should overspeed training be done over?
50m
How steep should the slope be when downhill running?
Optimum - 5degs