# CHAPTER 19 - Program Design and Technique for Speed Flashcards

RFD (Rate of Force Development)

the development of maximal force in minimal time, typically used as an index of explosive strength

change in force by chance in time

Impulse

the product of the generated force and the time required for its production.

measure under the force-time curve

change in momentum

speed

rate at which an object covers a distance

Velocity

how fast and which direction an object is traveling

Acceleration

rate in which the velocity changes in time

Most Important Factor Of Sprinting Success

RFD

Nervous System

Strength training enhances neural drive

Increases in Neural Drive

related to increases in both muscular force production and the rate of force production

SSC (Stretch-Shortening Cycle)

Eccentric-Concentric coupling phenomenon

Criteria to improve SSC

- Skillful, multijoint movements
- Brief work bouts (Plyo + Heavy Resistance)

Spring-Mass Model

Mathematical model that depicts sprinting’s a type of human locomotion in which displacement of a body mass is the aftereffect from energy produced and is delivered through the collective coiling and extension of spring-like actions

Running Speed

Sprint speed is an interaction of stride frequency and stride length

Differences between elite and novice sprinters

- Amount of vertical force applied to the ground during the stance phase
- Greater forces must be applied in shortest time (RDF)
- Elite sprinters achieve longer stride lengths compared to novice
- Elite sprinters achieve higher stride rates

Increase in Speed

It can be achieved by increase of stride length or stride frequency, or both.

Ground Contact Time

The total time allotted for a single stance phase