Resistance Training Chapter 19

speed

the skills and abilities needed to achieve high movement velocities

Change of direction

The skills and abilities needed to explosively change movement direction, velocities, or modes

Agility

The skills and abilities needed to change direction, velocity, or mode in response to a stimulus

Speed vs Agility

• speed: requires the ability to accelerate and reach maximal velocity

• agility: requires the use of perceptual-cognitive ability (respond to a stimulus) in combination with the ability to decelerate and then reaccelerate in an intended direction

RFD and impulse

the 2 variables that describe force relative to the time available to produce force

Impulse

• the change in momentum resulting from a force, measured as the product of force and time

• describes force relative to time available to produce force

  • note: a basic objective of training is to move the force-time curve up and to the left, generating a greater impulse and momentum during the limited time over which force is applied

Rate of Force Development (RFD)

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

• RFD= change in force/change in time

• describes force relative to time available to produce force

Acceleration

the change in an object’s velocity due to movement of mass

Velocity vs Speed

• Velocity: describes both how fast an object is traveling and in what direction (vector quantity)

• Speed: describes only how fast an object is traveling (scalar quantity; no direction)

Max force development takes about ____ ms, but many sport activities performed between ___-_____ ms

300

1-200